TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Description
Features
Due to smaller size (fit the standard dimensions of
•
RoHS compliant
2.5” SATA Hard Disk Drives), huge capacity, high
•
Fully compatible with devices and OS that support the
SATA 3Gb/s standard
•
Non-volatile Flash Memory for outstanding data
retention
•
Built-in ECC (Error Correction Code) functionality and
wear-leveling algorithm ensures highly reliable of data
transfer
•
Shock resistance
speed, and low power consumption, Solid State Disk
is perfect replacement storage device for PCs,
Laptops, gaming systems, and handheld devices.
Placement
B
C
Dimensions
Side
Millimeters
Inches
A
100.30 ± 0.40
3.949 ± 0.016
B
69.85 ± 0.20
2.750 ± 0.008
C
9.50 ± 0.15
0.374 ± 0.004
A
Transcend Information Inc.
1
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Specifications
Physical Specification
Form Factor
2.5-inch HDD
Storage Capacities
8 GB to 192 GB
Dimensions (mm)
Length
100.0 0 ± 0.40
Width
69.85 ± 0.20
Height
9.50 ± 0.15
Input Voltage
5V ± 5%
Weight
66g ± 5g
Connector
SATA 7+15 pins combo connector
Environmental Specifications
Operating Temperature
0 ℃ to 70 ℃
Storage Temperature
- 40 ℃ to 85 ℃
Humidity
Operating
0% to 95% (Non-condensing)
Non-Operating
0% to 95% (Non-condensing)
Power Requirements
5V ± 5% @25℃
Input Voltage
Mode
Power Consumption
(8/16/32/64GB)
Power Consumption
(192GB)
Max. (mA)
Max. (W)
Write(peak)
476.1
2.4
Read(peak)
426.2
2.1
Idle(peak)
144.0
0.7
Write(peak)
573.3
2.9
Read(peak)
483.1
2.4
Idle(peak)
146.2
0.7
Transcend Information Inc.
2
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Performance
Model P/N
Sequential Read(Max.)
Sequential Write(Max.)
TS8GSSD25S-S
150 MB/s
90 MB/s
TS16GSSD25S-M
150 MB/s
50 MB/s
TS16GSSD25S-S
150 MB/s
100 MB/s
TS32GSSD25S-S
150 MB/s
120 MB/s
TS64GSSD25S-S
170 MB/s
140 MB/s
TS192GSSD25S-M
150 MB/s
90 MB/s
Actual Capacity
Model P/N
User Max. LBA
Cylinder
Head
Sector
TS8GSSD25S-S
15,621,984
15,498
16
63
TS16GSSD25S-M
31,277,056
16,383
16
63
TS16GSSD25S-S
31,277,056
16,383
16
63
TS32GSSD25S-S
62,586,880
16,383
16
63
TS64GSSD25S-S
125,206,528
16,383
16
63
TS192GSSD25S-M
375,685,120
16,383
16
63
Transcend Information Inc.
3
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Reliability
Data Reliability
Supports BCH ECC 8 bits or 15 bits in 512 bytes
Data Retention
10 years
MTBF
1,000,000 hours
Vibration
3.0G, 5 - 800Hz
Operating
3.0G, 5 - 800Hz
Non-Operating
* Note: Reference to the IEC 60068-2-6 Testing procedures; Operating-Sine wave, 5-800Hz/1 oct., 1.5mm, 3g, 0.5
hr./axis, total 1.5 hrs.
Shock
1500G, 0.5ms
Operating
1500G, 0.5ms
Non-Operating
* Note: Reference to the IEC 60068-2-27 Testing procedures; Operating-Half-sine wave, 1500g, 0.5ms, 3 times/dir., total
18 times.
Regulations
Compliance
CE, FCC and BSMI
Transcend Information Inc.
4
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Package Dimensions
Below figure illustrates the Transcend 2.5” SATA Solid State Disk. All dimensions are in mm.
*Note: Tighten mounting screws with no more than 1.0Kg-cm (0.07ft-lbs) of torque.
Transcend Information Inc.
5
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Pin Assignments
Pin No.
Pin Name
Pin No.
Pin Name
01
03
05
07
09
GND
ABGND
NC
02
04
06
08
10
A+
GND
B+
NC
NC
11
13
15
17
19
21
GND
GND
5V
GND
GND
NC
12
14
16
18
20
22
GND
5V
5V
GND
NC
NC
Pin Layout
Transcend Information Inc.
6
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Block Diagram
Transcend Information Inc.
7
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Reliability
Wear-Leveling algorithm
The controller supports static/dynamic wear leveling. When the host writes data, the controller will find and use the block
with the lowest erase count among the free blocks. This is known as dynamic wear leveling. When the free blocks' erase
count is higher than the data blocks', it will activate the static wear leveling, replacing the not so frequently used user
blocks with the high erase count free blocks.
ECC algorithm
The controller uses BCH8/BCH15 ECC algorithm per 512 bytes. BCH8/BCH15 can correct up to 8 or 15 random error
bits within 512 data bytes.
Bad-block management
When the flash encounters ECC failed, program fail or erase fail, the controller will mark the block as bad block to
prevent the used of this block and caused data lost later on.
Transcend Information Inc.
8
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
SATA Interface
Out of bank signaling
There shall be three Out Of Band (OOB) signals used/detected by the Phy: COMRESET, COMINIT, and COMWAKE.
COMINIT, COMRESET and COMWAKE OOB signaling shall be achieved by transmission of either a burst of four Gen1
ALIGNP primitives or a burst composed of four Gen1 Dwords with each Dword composed of four D24.3 characters, each
burst having a duration of 160 UIOOB. Each burst is followed by idle periods (at common-mode levels), having durations
as depicted in Figure 4 and Table 2.
Figure 4 : OOB signals
Table 2 : OOB signal times
Transcend Information Inc.
9
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
COMRESET
COMRESET always originates from the host controller, and forces a hardware reset in the device. It is indicated by
transmitting bursts of data separated by an idle bus condition. The OOB COMRESET signal shall consist of no less than
six data bursts, including inter-burst temporal spacing. The COMRESET signal shall be:
1) Sustained/continued uninterrupted as long as the system hard reset is asserted, or
2) Started during the system hardware reset and ended some time after the negation of system hardware reset, or
3) Transmitted immediately following the negation of the system hardware reset signal.
The host controller shall ignore any signal received from the device from the assertion of the hardware reset signal until
the COMRESET signal is transmitted. Each burst shall be 160 Gen1 UI’s long (106.7 ns) and each inter-burst idle state
shall be 480 Gen1 UI’s long (320 ns). A COMRESET detector looksfor four consecutive bursts with 320 ns spacing
(nominal). Any spacing less than 175 ns or greater than 525 ns shall invalidate the COMRESET detector output. The
COMRESET interface signal to the Phy layer shall initiate the Reset sequence shown in Figure 5 below. The interface
shall be held inactive for at least 525 ns after the last burst to ensure far-end detector detects the negation properly.
Figure 5 : comreset sequence
Description:
Transcend Information Inc.
10
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
1. Host/device are powered and operating normally with some form of active communication.
2. Some condition in the host causes the host to issue COMRESET
3. Host releases COMRESET. Once the condition causing the COMRESET is released, the host releases the
COMRESET signal and puts the bus in a quiescent condition.
4. Device issues COMINIT – When the device detects the release of COMRESET, it responds with a COMINIT. This is
also the entry point if the device is late starting. The device may initiate communications at any time by issuing a COMINIT.
5. Host calibrates and issues a COMWAKE.
6. Device responds – The device detects the COMWAKE sequence on its RX pair and calibrates its transmitter (optional).
Following calibration the device sends a six burst COMWAKE sequence and then sends a continuous stream of the
ALIGN sequence starting at the device's highest supported speed. After ALIGNP Dwords have been sent
for 54.6us (2048 nominal Gen1 Dword times) without a response from the host as determined by detection of ALIGNP
primitives received from the host, the device assumes that the host cannot communicate at that speed. If additional
speeds are available the device tries the next lower supported speed by sending ALIGNP Dwords at that rate for
54.6 us (2048 nominal Gen1 Dword times.) This step is repeated for as many slower speeds as are supported. Once the
lowest speed has been reached without response from the host, the device enters an error state.
7. Host locks – after detecting the COMWAKE, the host starts transmitting D10.2 characters at its lowest supported rate.
Meanwhile, the host receiver locks to the ALIGN sequence and, when ready, returns the ALIGN sequence to the device at
the same speed as received. A host shall be designed such that it acquires lock in 54.6us (2048
nominal Gen1 Dword times) at any given speed. The host should allow for at least 873.8 us (32768 nominal Gen1 Dword
times) after detecting the release of COMWAKE to receive the first ALIGNP. This ensures interoperability with
multi-generational and synchronous designs. If no ALIGNP is received within 873.8 us (32768 nominal Gen1 Dword
times) the host restarts the power-on sequence – repeating indefinitely until told to stop by the Application layer.
8. Device locks – the device locks to the ALIGN sequence and, when ready, sends SYNCP indicating it is ready to start
normal operation.
9. Upon receipt of three back-to-back non-ALIGNP primitives, the communication link is established and normal operation
may begin.
Transcend Information Inc.
11
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
COMINIT
COMINIT always originates from the drive and requests a communication initialization. It is electrically identical to the
COMRESET signal except that it originates from the device and is sent to the host. It is used by the device to request a
reset from the host in accordance to the sequence shown in Figure 6, below.
Figure 6 : cominit sequence
Description:
1. Host/device are powered and operating normally with some form of active communication.
2. Some condition in the device causes the device to issues a COMINIT
3. Host calibrates and issues a COMWAKE.
4. Device responds – The device detects the COMWAKE sequence on its RX pair and calibrates its transmitter (optional).
Following calibration the device sends a six burst COMWAKE sequence and then sends a continuous stream of the
ALIGN sequence starting at the device's highest supported speed. After ALIGNP Dwords have been sent for 54.6 us (2048
nominal Gen1 Dword times) without a response from the host as determined by detection of ALIGNP primitives received
from the host, the device assumes that the host cannot communicate at that speed. If additional speeds are available the
Transcend Information Inc.
12
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
device tries the next lower supported speed by sending ALIGNP Dwords at that rate for 54.6 us (2048 nominal Gen1
Dword times.) This step is repeated for as many slower speeds as are supported. Once the lowest speed has been
reached without response from the host, the device enters an error state.
5. Host locks – after detecting the COMWAKE, the host starts transmitting D10.2 characters at its lowest supported rate.
Meanwhile, the host receiver locks to the ALIGN sequence and, when ready, returns the ALIGN sequence to the device at
the same speed as received. A host shall be designed such that it acquires lock in 54.6 us (2048 nominal Gen1 Dword
times) at any given speed. The host should allow for at least 873.8 us (32768 nominal Gen1 Dword times) after detecting
the release of COMWAKE to receive the first ALIGNP. This ensures interoperability with multi-generational and
synchronous designs. If no ALIGNP is received within 873.8 us (32768 nominal Gen1 Dword times) the host restarts the
power-on sequence – repeating indefinitely until told to stop by the Application layer. 6. Device locks – the device locks to
the ALIGN sequence and, when ready, sends SYNCP indicating it is ready to start normal operation.
6. Upon receipt of three back-to-back non-ALIGNP primitives, the communication link is established and normal operation
may begin.
Transcend Information Inc.
13
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Power on sequence timing diagram
The following timing diagrams and descriptions are provided for clarity and are informative.
Figure 7 : power on sequence
Description:
1. Host/device power-off - Host and device power-off.
2. Power is applied - Host side signal conditioning pulls TX and RX pairs to neutral state (common mode voltage).
3. Host issues COMRESET
4. Host releases COMRESET. Once the power-on reset is released, the host releases the COMRESET signal and puts
the bus in a quiescent condition.
5. Device issues COMINIT – When the device detects the release of COMRESET, it responds with a COMINIT. This is
also the entry point if the device is late starting. The device may initiate communications at any time by issuing a COMINIT.
6. Host calibrates and issues a COMWAKE.
7. Device responds – The device detects the COMWAKE sequence on its RX pair and calibrates its transmitter (optional).
Following calibration the device sends a six burst COMWAKE sequence and then sends a continuous stream of the
Transcend Information Inc.
14
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
ALIGN sequence starting at the device's highest supported speed. After ALIGNP primitives have been sent for 54.6 us
(2048 nominal Gen1 Dword times) without a response from the host as determined by detection of ALIGNP primitives
received from the host, the device assumes that the host cannot communicate at that speed. If additional speeds are
available the device tries the next lower supported speed by sending ALIGNP primitives at that rate for 54.6 us (2048
nominal Gen1 Dword times.) This step is repeated for as many slower speeds as are supported. Once the lowest speed
has been reached without response from the host, the device shall enter an error state.
8. Host locks – after detecting the COMWAKE, the host starts transmitting D10.2 characters at its lowest supported rate.
Meanwhile, the host receiver locks to the ALIGN sequence and, when ready, returns the ALIGN sequence to the device at
the same speed as received. A host shall be designed such that it acquires lock in 54.6 us (2048 nominal Gen1 Dword
times) at any given speed. The host should allow for at least 873.8 us (32768 nominal Gen1 Dword times) after detecting
the release of COMWAKE to receive the first ALIGNP. This insures interoperability with multi-generational and
synchronous designs. If no ALIGNP is received within 873.8 us (32768 nominal Gen1 Dword times) the host restarts the
power-on sequence – repeating indefinitely until told to stop by the Application layer.
9. Device locks – the device locks to the ALIGN sequence and, when ready, sends the SYNCP primitive indicating it is
ready to start normal operation.
10. Upon receipt of three back-to-back non-ALIGNP primitives, the communication link is established and normal operation
may begin.
Transcend Information Inc.
15
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
ATA command register
This table with the following paragraphs summarizes the ATA command set.
Command Table
Command Name
PARAMETERS USED
Code
SC
SN
CY
DR
HD
FT
CHECK POWER MODE
E5h
X
X
X
O
X
X
EXECUTE DIAGNOSTICS
90h
X
X
X
O
X
X
FLUSH CACHE
E7h
X
X
X
O
O
X
FLUSH CACHE EXT
EAh
X
X
X
O
O
X
IDENTIFY DEVICE
ECh
X
X
X
O
X
X
IDLE
E3h
O
X
X
O
X
X
IDLE IMMEDIATE
E1h
X
X
X
O
X
X
INITIALIZE DEVICE PARAMETERS
91h
O
X
X
O
O
X
READ BUFFER
E4h
X
X
X
O
X
X
C8h or C9h
O
O
O
O
O
X
READ DMA EXT
25h
O
O
O
O
O
X
READ FPDMA QUEUED
60h
O
O
O
O
O
O
READ LOG EXT
2Fh
O
O
O
O
O
O
READ MULTIPLE
C4h
O
O
O
O
O
X
READ MULTIPLE EXT
29h
O
O
O
O
O
X
20h or 21h
O
O
O
O
O
X
24h
O
O
O
O
O
X
40h or 41h
O
O
O
O
O
X
READ VERIFY SECTOR(S) EXT
42h
O
O
O
O
O
X
RECALIBRATE
10h
X
X
X
O
X
X
SECURITY DISABLE PASSWORD
F6h
X
X
X
O
X
X
SECURITY ERASE PREPARE
F3h
X
X
X
O
X
X
SECURITY ERASE UNIT
F4h
X
X
X
O
X
X
SECURITY FREEZE LOCK
F5h
X
X
X
O
X
X
SECURITY SET PASSWORD
F1h
X
X
X
O
X
X
SECURITY UNLOCK
F2h
X
X
X
O
X
X
READ DMA
READ SECTOR(S)
READ SECTOR(S) EXT
READ VERIFY SECTOR(S)
Transcend Information Inc.
16
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
SEEK
7xh
X
X
O
O
O
X
SET FEATURES
EFh
O
X
X
O
X
O
SET MULTIPLE MODE
C6h
O
X
X
O
X
X
SLEEP
E6h
X
X
X
O
X
X
SMART
B0h
X
X
O
O
X
O
STANDBY
E2h
X
X
X
O
X
X
STANDBY IMMEDIATE
E0h
X
X
X
O
X
X
WRITE BUFFER
E8h
X
X
X
O
X
X
CAh or CBh
O
O
O
O
O
X
WRITE DMA EXT
35h
O
O
O
O
O
X
WRITE DMA FUA EXT
3Dh
O
O
O
O
O
X
WRITE FPDMA QUEUED
61h
O
O
O
O
O
O
WRITE MULTIPLE
C5h
O
O
O
O
O
X
WRITE MULTIPLE EXT
39h
O
O
O
O
O
X
WRITE MULTIPLE FUA EXT
CEh
O
O
O
O
O
X
30h or 31h
O
O
O
O
O
X
34h
O
O
O
O
O
X
WRITE DMA
WRITE SECTOR(S)
WRITE SECTOR(S) EXT
Note:
O = Valid, X = Don't care
SC = Sector Count Register
SN = Sector Number Register
CY = Cylinder Low/High Register
DR = DEVICE SELECT Bit (DEVICE/HEAD Register Bit 4)
HD = HEAD SELECT Bit (DEVICE/HEAD Register Bit 3-0)
FT = Features Register
Transcend Information Inc.
17
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
ATA Command Specifications
CHECK POWER MODE (E5h)
The host can use this command to determine the current power management mode.
EXECUTE DIAGNOSTICS (90h)
This command performs the internal diagnostic tests implemented by the drive.
FLUSH CACHE (E7h)
This command is used by the host to request the device to flush the write cache. If there is data in the write cache, that
data shall be written to the media. The BSY bit shall remain set to one until all data has been successfully written or an
error occurs.
FLUSH CACHE EXT (EAh)
48-bit feature set mandatory command. This command is used by the host to request the device to flush the write cache.
If there is data in the write cache, that data shall be written to the media. The BSY bit shall remain set to one until all data
has been successfully written or an error occurs.
IDENTIFY DEVICE (ECh)
This commands read out 512Bytes of drive parameter information. Parameter Information consists of the arrangement
and value as shown in the following table. This command enables the host to receive the Identify Drive Information from
the device.
Transcend Information Inc.
18
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Identify Device Information Default Value
Word
0
1
Value
0040h
3C8Ah
F/V
Description
F
General configuration bit-significant information:
15
0 = ATA device
X
X
14-8 Retired
7-6 Obsolete
X
V
5-3
2
X
1
Retired
0
Reserved
Number of logical cylinders
15498 (8GB capacity)
F
3FFFh
Retired
Reserved
16383 (above 16GB capacity)
2
C837h
V
Specific configuration
3
0010h
F
Number of logical heads
4-5
0000h
X
Retired
6
003Fh
F
7-8
0000h
Number of logical sector per logical track
Reserved for assignment by the CompactFlash_ Association
9
0000h
X
Retired
10-19
XXXXh
F
Serial number (20 ASCII characters)
20-21
0000h
X
Retired
22
0000h
X
Obsolete
23-26
XXXXh
F
Firmware revision (8 ASCII characters)
27-46
XXXXh
F
Model number (40 ASCII characters)
8001h
F
F
15-8 80h
7-0 00h = Reserved
47
F
48
0000h
F
01h = Maximum number of 1 sectors on READ/WRITE MULTIPLE commands
Reserved
Capabilities
F
15-14 Reserved for the IDENTIFY PACKET DEVICE command.
13
1 = Standby timer values as specified in this standard are supported
12
49
50
2F00h
4000h
0 = Standby timer values shall be managed by the device
Reserved for the IDENTIFY PACKET DEVICE command.
F
11
1 = IORDY supported
0 = IORDY may be supported
F
F
10
9
1 = IORDY may be disabled
1 = LBA supported
F
X
8
7-0
1 = DMA supported.
Retired
F
Capabilities
15
Shall be cleared to zero.
F
14
Shall be set to one.
13-2 Reserved.
X
1
Transcend Information Inc.
Obsolete
19
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
51
0000h
52
0000h
53
0007h
2.5” Solid State Disk
F
0
F
15-8
7-0
Shall be set to one to indicate a device specific Standby timer value minimum.
X
Obsolete
F
F
15-3 Reserved
2
1 = the fields reported in word 88 are valid
F
1
0 = the fields reported in word 88 are not valid
1 = the fields reported in words 70:64 are valid
X
0
0 = the fields reported in words 70:64 are not valid
1 = the fields reported in words 58:54 are valid
PIO data transfer cycle timing mode
Reserved
0 = the fields reported in words 58:54 are not valid
54
XXXXh
X
Number of current cylinders
55
00XXh
X
Number of current heads
56
XXXXh
X
Number of current sector per track
57-58
XXXXh
X
Current capacity in sectors
V
15-9 Reserved
8
1 = Multiple sector setting is valid
V
7-0
Total number of user addressable sectors
59
0101h
xxh = Setting for number of sectors that shall be transferred per interrupt on R/W Multiple command
60-61
XXXXh
F
62
0000h
X
Obsolete
F
V
15-11 Reserved
10
1 = Multiword DMA mode 2 is selected
V
9
0 = Multiword DMA mode 2 is not selected
1 = Multiword DMA mode 1 is selected
V
8
0 = Multiword DMA mode 1 is not selected
1 = Multiword DMA mode 0 is selected
63
0007h
7-3
0 = Multiword DMA mode 0 is not selected
Reserved
F
F
2
1
1 = Multiword DMA mode 2 and below are supported
1 = Multiword DMA mode 1 and below are supported
F
0
1 = Multiword DMA mode 0 is supported
15-8
Reserved
Advanced PIO modes supported
64
0003h
F
7-0
65
0078h
F
Minimum Multiword DMA transfer cycle time per word
66
0078h
F
Manufacturer’s recommended Multiword DMA transfer cycle time
67
0078h
F
Minimum PIO transfer cycle time without flow control
68
0078h
F
Minimum PIO transfer cycle time with IORDY flow control
69-70
0000h
Reserved
71-74
0000h
Reserved for the IDENTIFY PACKET DEVICE command
0000h
Queue depth
15-5 Reserved
75
F
Transcend Information Inc.
4-0
Maximum queue depth – 1
20
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Serial ATA Capabilities
76
77
0106h
F
15-11 Reserved for Serial ATA
10
1 = Supports Phy Event Counts
F
F
9
8
1 = Supports receipt of host initiated power management requests
1 = Supports the NCQ feature set
F
7-3
2
Reserved for Serial ATA
1 = Supports SATA Gen2 Signaling Speed (3.0Gb/s)
F
F
1
0
1 = Supports SATA Gen1 Signaling Speed (1.5Gb/s)
Shall be cleared to zero
0000h
Reserved for Serial ATA
Serial ATA feature supported
78
0004h
F
15-7 Reserved for Serial ATA
6
1 = Device supports Software Settings Preservation
F
5
4
Reserved for Serial ATA
1 = Device supports in-order data delivery
F
F
3
2
1 = Device supports initiating power management
1 = Device supports DMA Setup auto-activation
F
F
1
0
1 = Device supports non-zero buffer offsets
Shall be cleared to zero
Serial ATA feature enabled
79
0000h
V
15-7 Reserved for Serial ATA
6
1 = Software Settings Preservation enabled
V
5
4
Reserved for Serial ATA
1 = In-order data delivery enabled
V
V
3
2
1 = Device initiated power management enabled
1 = DMA Setup auto-activation enabled
V
F
1
0
1 = Non-zero buffer offsets enabled
Shall be cleared to zero
Major version number 0000h or FFFFh = device does not report version
80
81
00F0h
0000h
F
15
14
Reserved
Reserved for ATA/ATAPI-14
F
F
13
12
Reserved for ATA/ATAPI-13
Reserved for ATA/ATAPI-12
F
F
11
10
Reserved for ATA/ATAPI-11
Reserved for ATA/ATAPI-10
F
F
9
8
Reserved for ATA/ATAPI-9
Reserved for ATA/ATAPI-8
F
F
7
6
1 = supports ATA/ATAPI-7
1 = supports ATA/ATAPI-6
F
F
5
4
1 = supports ATA/ATAPI-5
1 = supports ATA/ATAPI-4
F
X
3
2
Obsolete
Obsolete
X
1
0
Obsolete
Reserved
F
Minor version number
Transcend Information Inc.
21
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Command and feature sets supported
82
83
84
304Bh
7400h
4060h
X
F
15
14
Obsolete
1 = NOP command supported
F
F
13
12
1 = READ BUFFER command supported
1 = WRITE BUFFER command supported
X
F
11
10
Obsolete
1 = Host Protected Area feature set supported
F
F
9
8
1 = DEVICE RESET command supported
1 = SERVICE interrupt supported
F
F
7
6
1 = release interrupt supported
1 = look-ahead supported
F
F
5
4
1 = write cache supported
Shall be cleared to zero to indicate that the PACKET Command feature set is not supported.
F
F
3
2
1 = mandatory Power Management feature set supported
1 = Removable Media feature set supported
F
F
1
0
1 = Security Mode feature set supported
1 = SMART feature set supported
F
Command and feature sets supported
15
Shall be cleared to zero
F
F
14
13
Shall be set to one
1 = The FLUSH CACHE EXT command is supported
F
F
12
11
Shall be set to one to indicate that the mandatory FLUSH CACHE command is supported
1 = The DCO feature set is supported
F
F
10
9
1 = The 48-bit Address feature set is suported
1 = The AAM feature set is supported
F
8
7
1 = SET MAX security extension supported
Reserved
F
F
6
5
1 = SET FEATURES subcommand required to spinup after power-up
1 = Power-Up In Standby feature set supported
F
F
4
3
1 = Removable Media Status Notification feature set supported
1 = Advanced Power Management feature set supported
F
F
2
1
1 = CFA feature set supported
1 = READ/WRITE DMA QUEUED supported
F
0
1 = DOWNLOAD MICROCODE command supported
F
Command and feature sets supported
15
Shall be cleared to zero
F
F
14
13
X
12-11 Reserved for TLC
10-9 Obsolete
F
F
8
7
1 = The 64-bit World wide name is supported
1 = The WRITE DMA QUEUED FUA EXT command is supported
F
F
6
5
1 = The WRITE DMA FUA EXT and WRITE MULTIPLE FUA EXT commands are supported
1 = The GPL feature set is supported
F
F
4
3
1 = The Streaming feature set is supported
1 = The Media Card Pass Through Command feature set is supported
F
F
2
1
1 = Media serial number is supported
1 = SMART self-test supported
Transcend Information Inc.
Shall be set to one
1 = The IDLE IMMEDIATE command with UNLOAD feature is supported
22
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
85
86
3069h
3400h
2.5” Solid State Disk
F
0
X
Command and feature sets supported or enable (Depend on the host enabling)
15
Obsolete
F
F
14
13
1 = The NOP command is supported
1 = The READ BUFFER command is supported
F
X
12
11
1 = The WRITE BUFFER command is supported
Obsolete
V
F
10
9
1 = HPA feature set is supported
Shall be cleared to zero to indicate that the DEVICE RESET command is not supported
V
V
8
7
1 = The SERVICE interrupt is enabled
1 = The release interrupt is enabled
V
V
6
5
1 = Read look-ahead is enabled
1 = The volatile write cache is enabled
F
F
4
3
Shall be cleared to zero to indicate that the PACKET Command feature set is not supported.
Shall be set to one to indicate that the mandatory Power Management feature is supported
X
V
2
1
Obsolete
1 = The Security feature set is enabled
V
0
1 = The SMART feature set is enabled
F
Command and feature sets supported or enable (Depend on the host enabling)
15
1 = Words 119-120 are valid
F
14
13
Reserved
1 = FLUSH CACHE EXT command supported
F
F
12
11
1 = FLUSH CACHE command supported
1 = The DCO feature set is supported
F
V
10
9
1 = The 48-bit Address feature set is supported
1 = The AAM feature set is enable
V
8
7
1 = The SET MAX security extension is enabled by SET MAX SET PASSWORD
Reserved for Address Offset Reserved Area Boot Method
F
V
6
5
1 = SET FEATURES subcommand required to spin-up after power-up
1 = The PUIS feature set is enabled
X
V
4
3
Obsolete
1 = The APM feature set is enabled
F
F
2
1
1 = The CFA feature set is supported
1 = The TCQ feature set is supported
0
1 = The DOWNLOAD MICROCODE command is supported
F
1 = SMART error logging supported
Command and feature sets supported or enabled (Depend on the host enabling)
87
4060h
F
F
15
14
F
13
1 = The IDLE IMMEDIATE command with UNLOAD feature is supported
12-11 Reserved for TLC
X
F
10-9 Obsolete
8
1 = The 64-bit World wide name is supported
F
F
7
6
1 = The WRITE DMA QUEUED FUA EXT command is supported
1 = The WRITE DMA FUA EXT and WRITE MULTIPLE FUA EXT commands are supported
F
X
5
4
1 = The GPL feature set is supported
Obsolete
V
V
3
2
1 = The Media Card Pass Through Command feature set is supported
1 = Media serial number is supported
Transcend Information Inc.
Shall be cleared to zero
Shall be set to one
23
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
F
1
1 = SMART self-test supported
F
0
1 = SMART error logging supported
Ultra DMA modes (XX depends on the host selecting)
88
XX7Fh
V
15
14
Reserved
1 = Ultra DMA mode 6 is selected
V
13
0 = Ultra DMA mode 6 is not selected
1 = Ultra DMA mode 5 is selected
V
12
0 = Ultra DMA mode 5 is not selected
1 = Ultra DMA mode 4 is selected
V
11
0 = Ultra DMA mode 4 is not selected
1 = Ultra DMA mode 3 is selected
V
10
0 = Ultra DMA mode 3 is not selected
1 = Ultra DMA mode 2 is selected
V
9
0 = Ultra DMA mode 2 is not selected
1 = Ultra DMA mode 1 is selected
V
8
0 = Ultra DMA mode 1 is not selected
1 = Ultra DMA mode 0 is selected
7
0 = Ultra DMA mode 0 is not selected
Reserved
F
F
6
5
1 = Ultra DMA mode 6 and below are supported
1 = Ultra DMA mode 5 and below are supported
F
F
4
3
1 = Ultra DMA mode 4 and below are supported
1 = Ultra DMA mode 3 and below are supported
F
F
2
1
1 = Ultra DMA mode 2 and below are supported
1 = Ultra DMA mode 1 and below are supported
F
0
1 = Ultra DMA mode 0 is supported
F
15-8 Reserved
7-0 Time required for Normal Erase mode SECURITY ERASE UNIT command
F
15-8 Reserved
7-0 Time required for Enhanced Erase mode SECURITY ERASE UNIT command
89
0001h
90
0001h
91
0000h
V
Current APM level value
92
FFFEh
V
Master Password Identifier
93
0000h
X
Hardware reset result
94
0000h
F
Current AAM value
15-8 Vendor’s recommended AAM value
V
7-0
95-99
0000h
100-103
XXXXh
104-105
0000h
Current AAM value
Reserved
X
Total Number of User Addressable Logical Sectors for 48-bit commands (QWord)
Reserved
Physical sector size / logical sector size
106
4000h
F
F
15
14
Shall be cleared to zero
Shall be set to one
F
F
13
12
1 = Device has multiple logical sectors per physical sector
1 = Device Logical Sector longer than 256 Words
F
11-4 Reserved
3-0 2x logical sectors per physical sector
Transcend Information Inc.
24
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
107-118
0000h
Reserved
F
119
4000h
4000h
121-126
0000h
127
0000h
Commands and feature sets supported (Continued from words 84:82)
15 Shall be cleared to zero
F
14 Shall be set to one
13-6 Reserved
F
F
5
4
1= The Free-fall Control feature set is supported
1 = The DOWNLOAD MICROCODE command with mode 3 is supported
F
F
3
2
1 = The READ LOG DMA EXT and WRITE LOG DMA EXT commands are supported
1 = The WRITE UNCORRECTABLE EXT command is supported
F
1
0
1 = The Write-Read-Verify feature set is supported
Reserved for DDT
F
120
2.5” Solid State Disk
Commands and feature sets supported or enabled (Continued from words 87:85)
15 Shall be cleared to zero
F
14 Shall be set to one
13-6 Reserved
V
F
5
4
1= The Free-fall Control feature set is enabled
1 = The DOWNLOAD MICROCODE command with mode 3 is supported
F
F
3
2
1 = The READ LOG DMA EXT and WRITE LOG DMA EXT commands are supported
1 = The WRITE UNCORRECTABLE EXT command is supported
V
1
0
1 = The Write-Read-Verify feature set is enabled
Reserved for DDT
Reserved for expended supported and enabled settings
X
Obsolete
Security status
128
0021h
129-159
0000h
160-216
0000h
217
0001h
218-254
0000h
F
V
15-9 Reserved
8
Security level 0 = High, 1 = Maximum
F
F
7-6
5
Reserved
1 = Enhanced security erase supported
V
V
4
3
1 = Security count expired
1 = Security frozen
V
V
2
1
1 = Security locked
1 = Security enabled
F
0
1 = Security supported
X
Vendor specific
Reserved
F
Nominal media rotation rate
Reserved
Integrity word
255
0000h
X
15-8 Checksum
7-0 Signature
Key:
F/V = Fixed/variable content
F = the content of the word is fixed and does not change. For removable media devices, these values may change when
Transcend Information Inc.
25
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
media is removed or changed.
V = the contents of the word is variable and may change depending on the state of the device or the commands executed
by the device.
X = the content of the word may be fixed or variable.
IDLE (E3h)
This command causes the device to set BSY, enter the Idle mode, clear BSY and generate an interrupt. If sector count is
non-zero, the automatic power down mode is enabled. If the sector count is zero, the automatic power mode is disabled.
IDLE IMMEDIATE (E1h)
This command causes the device to set BSY, enter the Idle(Read) mode, clear BSY and generate an interrupt.
INITIALIZE DEVICE PARAMETERS (91h)
This command enables the host to set the number of sectors per track and the number of tracks per heads.
READ BUFFER (E4h)
The READ BUFFER command enables the host to read a 512-byte block of data.
READ DMA (C8h)
Read data from sectors during Ultra DMA and Multiword DMA transfer. Use the SET FEATURES command to specify the
mode value. A sector count of zero requests 256 sectors.
READ DMA EXT (25h)
48-bit feature set mandatory command. Read data from sectors during Ultra DMA and Multiword DMA transfer. Use the
SET FEATURES command to specify the mode value. A sector count of zero requests 65536 sectors.
READ FPDMA QUEUED (60h)
NCQ feature set mandatory 48-bit command. This command requests that data to be transferred from the device to the
host.
READ LOG EXT (2Fh)
General purpose logging feature set mandatory 48-bit command. This command returns the specified log to the host.
Log Address
Log Name
Feature Set
R/W
Access
00h
Log directory
N/A
RO
GPL
10h
NCQ Command Error
NCQ
RO
GPL
READ MULTIPLE (C4h)
This command performs similarly to the Read Sectors command. Interrupts are not generated on each sector, but on the
Transcend Information Inc.
26
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
transfer of a block which contains the number of sectors defined by a Set Multiple command.
READ MULTIPLE EXT (29h)
48-bit feature set mandatory command. This command performs similarly to the Read Sectors command. Interrupts are
not generated on each sector, but on the transfer of a block which contains the number of sectors defined by a Set Multiple
command.
READ SECTOR(S) (20h/21h)
This command reads 1 to 256 sectors as specified in the Sector Count register from sectors which is set by Sector number
register. A sector count of 0 requests 256 sectors. The transfer beings specified in the Sector Number register.
READ SECTOR(S) EXT (24h)
48-bit feature set mandatory command. This command reads 1 to 65536 sectors as specified in the Sector Count register
from sectors which is set by Sector number register. A sector count of zero requests 65536 sectors. The transfer beings
specified in the Sector Number register.
READ VERIFY SECTOR(S) (40h/41h)
This command verifies one or more sectors on the drive by transferring data from the flash media to the data buffer in the
drive and verifying that the ECC is correct. This command is identical to the Read Sectors command, except that DRQ is
never set and no data is transferred to the host.
READ VERIFY SECTOR(S) EXT (42h)
48-bit feature set mandatory command. This command verifies one or more sectors on the drive by transferring data from
the flash media to the data buffer in the drive and verifying that the ECC is correct. This command is identical to the Read
Sectors command, except that DRQ is never set and no data is transferred to the host.
RECALIBRATE (10h)
The current drive performs no processing if it receives this command. It is supported for backward compatibility with
previous devices.
SECURITY DISABLE PASSWORD (F6h)
Disables any previously set user password and cancels the lock. The host transfers 512 bytes of data, as shown in the
following table, to the drive. The transferred data contains a user or master password, which the drive compares with the
saved password. If they match, the drive cancels the lock. The master password is still saved. It is re-enabled by issuing
the SECURITY SET PASSWORD command to re-set a user password.
Transcend Information Inc.
27
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
SECURITY ERASE PREPARE (F3h)
This command shall be issued immediately before the Security Erase Unit command to enable erasing and unlocking.
This command prevents accidental loss of data on the drive.
SECURITY ERASE UNIT (F4h)
The host uses this command to transfer 512 bytes of data, as shown in the following table, to the drive. The transferred
data contains a user or master password, which the drive compares with the saved password. If they match, the drive
deletes user data, disables the user password, and cancels the lock. The master password is still saved. It is re-enabled
by issuing the SECURITY SET PASSWORD command to re-set a user password.
Transcend Information Inc.
28
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
SECURITY FREEZE LOCK (F5h)
Causes the drive to enter Frozen mode. Once this command has been executed, the following commands to update a lock
result in the Aborted Command error:
• SECURITY SET PASSWORD
• SECURITY UNLOCK
• SECURITY DISABLE PASSWORD
• SECURITY ERASE PREPARE
• SECURITY ERASE UNIT
The drive exits from Frozen mode upon a power-off or hard reset. If the SECURITY FREEZE LOCK command is issued
when the drive is placed in Frozen mode, the drive executes the command, staying in Frozen mode.
SECURITY SET PASSWORD (F1h)
This command set user password or master password. The host outputs sector data with PIO data-out protocol to indicate
the information defined in the following table.
Security set Password data content
Word
0
Content
Control word
Bit 0
Identifier
0=set user password
1=set master password
Bits 1-7
Reserved
Bit 8
Security level
0=High
1=Maximum
Bits 9-15
1-16
17-255
Reserved
Password (32 bytes)
Reserved
SECURITY UNLOCK (F2h)
This command disable LOCKED MODE of the device. This command transfers 512 bytes of data from the host with PIO
data-out protocol. The following table defines the content of this information.
Transcend Information Inc.
29
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Security Unlock information
Word
Content
0
Control word
Bit 0
Identifier
0=compare user password
1=compare master password
Bits 1-15
1-16
Reserved
Password (32 bytes)
17-255
Reserved
SEEK (7xh)
This command is effectively a NOP command to the device although it does perform a range check.
SET FEATURES (EFh)
This command set parameter to Features register and set drive’s operation. For transfer mode, parameter is set to Sector
Count register. This command is used by the host to establish or select certain features.
Features register Value and settable operating mode
Value
Function
02h
Enable write cache
03h
Set transfer mode based on value in Sector Count register.
55h
Disable read look-ahead feature
82h
Disable write cache
AAh
Enable read look-ahead feature
SET MULTIPLE MODE (C6h)
This command enables the device to perform READ MULTIPLE and WRITE MULTIPLE operations and establishes the
block count for these commands.
SLEEP (E6h)
This command causes the device to set BSY, enter the Sleep mode, clear BSY and generate an interrupt.
Transcend Information Inc.
30
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
SMART Function Set (B0h)
Performs different processing required for predicting device failures, according to the subcommand specified in the
Features register. If the Features register contains an unsupported value, the Aborted Command error is returned. If the
SMART function is disabled, any subcommand other than SMART ENABLE OPERATIONS results in the Aborted
Command error.
Code
Smart Subcommand
D0h
READ DATA
D1h
READ ATTRIBUTE THRESHOLDS
D2h
ENABLE/DISABLE ATTRIBUTE AUTOSAVE
D3h
SAVE ATTRIBUTE VALUES
D5h
Reserved
D6h
Reserved
D8h
ENABLE OPERATIONS
D9h
DISABLE OPERATIONS
DAh
RETURN STATUS
Transcend Information Inc.
31
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
SMART READ DATA
This command returns 512-byte SMART Data Structure to the host with PIO data-in protocol. The register file has to
contain D0h for Features register, 4Fh for LBA Mid register and C2h for the LBA High register.
Byte
Description
0-1
Data structure revision number
2-13
1st attribute data
14-361
2nd-30th Individual attribute data
362
Off-line data collection status
363
Reserved
Total time in seconds to complete off-line data
364-365
collection
366
Reserved
367
Off-line data collection capability
368-369
SMART capability
370-385
Reserved
386-510
Reserved
511
Data structure Checksum
Byte 2-361: Individual attribute data
Byte
Description
0
Attribute ID
1-2
Status Flag (0x0002)
3
Attribute Value (0x64)
4-11
Transcend Information Inc.
Vendor Specific
32
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
The attribute ID information is listed in the following table
ID
Detail Information
Description
Byte
E5h
E8h
E9h
EAh
Halt System ID, Flash ID
Firmware version information
ECC Fail Record
Average Erase Count, Max Erase
Count
Transcend Information Inc.
Description
0
Halt System ID
1
Flash ID (byte 1)
2
Flash ID (byte 2)
3
Flash ID (byte 3)
4
Flash ID (byte 4)
5
Flash ID (byte 5)
6
Flash ID (byte 6)
7
Flash ID (byte 7)
0
Year (High Byte, ASCII)
1
Year (Low Byte, ASCII)
2
Month (High Byte, ASCII)
3
Month (Low Byte, ASCII)
4
Day (High Byte, ASCII)
5
Day (Low Byte, ASCII)
6
Channels (binary)
7
Banks (binary)
0
ECC fail number
1
Row address 3
2
Row address 2
3
Row address 1
4
Channel number of last ECC fail
5
Bank number of last ECC fail
6
Reserved
7
Reserved
0
Average Erase Count (High Byte)
1
Average Erase Count
2
Average Erase Count (Low Byte)
3
Max Erase Count (High Byte)
4
Max Erase Count
33
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
EBh
2.5” Solid State Disk
Good Block Count, System Block Count
5
Max Erase Count (Low Byte)
6
Reserved
7
Reserved
0
Good Block Count (High Byte)
1
Good Block Count
2
Good Block Count (Low Byte)
3
System(Free) Block Count (High
4
Byte)
5
System(Free) Block Count (Low
6
Byte)
7
Reserved
Reserved
Reserved
ECh-FFh
Reserved
SMART READ ATTRIBUTE THRESHOLD
This transfers 512 bytes of drive failure threshold data to the host.
SMART ENABLE/DISABLE ATTRIBUTE AUTOSAVE
Enables or disables the attribute value autosave function. This command specifies whether the current attribute values are
automatically saved to the drive when it changes the mode. This setting is maintained when the power is turned on and off.
SMART SAVE ATTRIBUTE VALUE
Saves any modified attribute values.
SMART EXECUTE OFF-LINE IMMEDIATE
This command of Non-data input causes the controller to immediately initiate the set of activities that collect SMART data
in a off-line mode and then save data to the Nand flash memory, or execute a selfdiagnostic test routine in either captive or
off-line mode.
SMART ENABL OPERATIONS
Enables the SMART function. This setting is maintained when the power is turned off and then back on. Once the SMART
function is enabled, subsequent SMART ENABLE OPERATIONS commands do not affect any parameters.
SMART DISABLE OPERATIONS
Disables the SMART function. Upon receiving the command, the drive disables all SMART operations. This setting is
Transcend Information Inc.
34
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
maintained when the power is turned off and then back on.
Once this command has been received, all SMART commands other than SMART ENABLE OPERATIONS are aborted
with the Aborted Command error.
This command disables all SMART capabilities including any and all timer and event count functions related exclusively to
this feature. After command acceptance, this controller will disable all SMART operations. SMART data in no longer be
monitored or saved. The state of SMART is preserved across power cycles.
SMART RETURN STATUS
Reports the drive reliability status.
Values reported when a predicted defect has not been detected:
Cylinder Low register: 4Fh
Cylinder High register: C2h
Values reported when a predicted defect has been detected:
Cylinder Low register: F4h
Cylinder High register: 2Ch
SMART ENABLE/DISABLE AUTOMATIC OFF-LINE
Enables (when Sector Count register = “F8h”) or disables (Sector Count register = “00h”) the automatic off-line data
collection function. The automatic collection is disabled if a value of “00h” is set in the Sector Count register before a
subcommand is issued. If automatic collection is disabled, the drive can still save attribute information during normal
operation, such as during the power-on/off sequence or error correction sequence. The automatic collection function is
enabled if a value of “F8h” is set in the Sector Count register before the command is issued. Values other than “00h” and
“F8h” are vendor-specific.
Transcend Information Inc.
35
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
STANDBY (E2h)
This command causes the device to set BSY, enter the Sleep mode (which corresponds to the ATA “Standby” Mode),
clear BSY and return the interrupt immediately.
STANDBY IMMEDIATE (E0h)
This command causes the drive to set BSY, enter the Sleep mode (which corresponds to the ATA “Standby” Mode), clear
BSY and return the interrupt immediately.
WRITE BUFFER (E8h)
This command enables the host to write the contents of one 512-byte block of data to the device’s buffer.
WRITE DMA (CAh)
Write data to sectors during Ultra DMA and Multiword DMA transfer. Use the SET FEATURES command to specify the
mode value.
WRITE DMA EXT (35h)
48-bit feature set mandatory command. Write data to sectors during Ultra DMA and Multiword DMA transfer. Use the SET
FEATURES command to specify the mode value.
WRITE DMA FUA EXT (3Dh)
48-bit feature set mandatory command. This command provides the same function as the WRITE DMA EXT command
except that regardless of whether volatile and/or non-volatile write caching in the device is enabled or not, the user data
shall be written to non-volatile media before command completion is reported.
WRITE FPDMA QUEUED (61h)
NCQ feature set mandatory 48-bit command. This command causes data to be transferred from the host to the device.
WRITE MULTIPLE (C5h)
This command is similar to the Write Sectors command. Interrupts are not presented on each sector, but on the transfer of
a block which contains the number of sectors defined by Set Multiple command.
WRITE MULTIPLE EXT (39h)
Transcend Information Inc.
36
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
48-bit feature set mandatory command. This command is similar to the Write Sectors command. Interrupts are not
presented on each sector, but on the transfer of a block which contains the number of sectors defined by Set Multiple
command.
WRITE MULTIPLE FUA EXT (CEh)
48-bit feature set mandatory command. This command provides the same functionality as the WRITE MULTIPLE EXT
command except that regardless of whether volatile and/or non-volatile write caching in the device is enabled or not, the
user data shall be written to non-volatile media before command completion is reported.
WRITE SECTOR(S) (30h/31h)
Write data to a specified number of sectors (1 to 256, as specified with the Sector Count register) from the specified
address. Specify “00h” to write 256 sectors.
WRITE SECTOR(S) EXT (34h)
48-bit feature set mandatory command. Write data to a specified number of sectors (1 to 65536, as specified with the
Sector Count register) from the specified address. Specify “00h” to write 65536 sectors.
Transcend Information Inc.
37
V2.6
TTS
S88G
GS
SS
SD
D2255S
S--S
S
TTS
S1166G
GS
SS
SD
D2255S
S--S
S//M
M
TTS
SS
SD
D2255S
S--S
S
S3322G
GS
TTS
S6644G
GS
SS
SD
D2255S
S--S
S
TTS
S--M
M
S119922G
GS
SS
SD
D2255S
2.5” Solid State Disk
Ordering Information
The above technical information is based on industry standard data and has been tested to be reliable. However,
Transcend makes no warranty, either expressed or implied, as to its accuracy and assumes no liability in connection with
the use of this product. Transcend reserves the right to make changes to the specifications at any time without prior notice.
USA
Los Angeles:
E-mail: sales@transcendusa.com
Maryland:
E-mail: sales_md@transcendusa.com
www.transcendusa.com
CHINA
E-mail: sales@transcendchina.com
www.transcendchina.com
TAIWAN
No.70, XingZhong Rd., NeiHu Dist., Taipei, Taiwan, R.O.C
TEL +886-2-2792-8000
Fax +886-2-2793-2222
E-mail: sales@transcend.com.tw
www.transcend.com.tw
GERMANY
E-mail: vertrieb@transcend.de
www.transcend.de
HONG KONG
E-mail: sales@transcend.com.hk
www.transcend.com.hk
JAPAN
E-mail: sales@transcend.co.jp
www.transcend.jp
THE NETHERLANDS
E-mail: sales@transcend.nl
www.transcend.nl
United Kingdom
E-mail: sales@transcend-uk.com
www.transcend-uk.com
KOREA
E-mail: sales@transcend.co.kr
www.transcend.co.kr
Transcend Information Inc.
38
V2.6