3.5. Reliability. Toshiba XM-7002B

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3.5. Reliability. Toshiba XM-7002B | Manualzz

3.5. Reliability

3.5.1. Error Rate

(1) Hard Read Error Rate (Byte Error Rate) ----- Allowing 10 Retries -----

Yellow-Book Mode 1/Mode 2 Form1

Yellow-Book Mode 2/Mode 2 Form2

10

-15

Max

10

-12

Max

(2) Seek Error Rate ---Allowing Retries---

10

-6

Max

3.5.2. MTBF

Assumptions: Power On Hours

On/Off Cycles

Number of Access

Operating Duty Cycle

3.5.3. MTTR

3.5.4. Drive Life

3.5.5. Mechanical Life

(1) Drawer Load/Eject

(2) Interface Connector Attach/Detach

60,000 POH

5,436 h/year

312 cycles/year

600,000 accesses/year

20 % of Power On Time

(Reading/Seeking)

0.5 h

15,000 h or 5 years(earlier one)

10,000 times or more

500 times or more

4. Configuration

See Figure 5 for details of the configurations.

4.1. Electrical Circuits

(1) Drawer Eject Switch

(2) Optical Pickup Servo Control Circuit

(3) Feed Motor Drive Circuit

(4) Laser Diode Control Circuit

(5) EFM Demodulator and CD-ROM Error Correction Circuit

(6) IDE/ATAPI Interface Control Circuit

(7) System Control Circuit

(8) Analog Audio output

4.2. Optical Pickup

4.3. Spindle Motor

4.4. Feed Motor

Semiconductor Laser and 3-beam System

Brush- less DC Motor

DC Motor with Non-contact Type Velocity sensor

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XM-7002B Rev.1.0

Figure 5 Basic configuration of XM-7002B

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XM-7002B Rev.1.0

5. Functions

5.1. CD-ROM Data Configurations

Figure 6 shows how the data is structured in program units.

1block=1/75 s

1-Disc

~

TNO

0

1

Time

TOC

Min

Sec

Block

Min

Sec

Block

2

AA

~

Lead-in

Block 1

Block 2 approx.

300k-

Blocks

~

Lead out

~

SYNC

12 bytes

Header

User Data

2048 bytes in Mode-1

2336 bytes in Mode-2

~

ECC(Mode-1)

~

288 bytes

Figure 6 CD-ROM Data Configuration

~

~

4 bytes

Minutes

Second(0~59)

Blocks(0~74)

Mode

5.2. Power ON/OFF Timing

Figure 7 shows the initialization.

Power ON

Max 500 ms

System

Initialization

Focus Serch

Spindle ON

Max 2 s

Learning

Idle

"TEST UNIT READY"

Command

Correspondence

Can't send

COMMAND

Max 3.5 s

Typ.13 s, Max 16 s

(Single Session Disc)

Any Command Sendable

"Check Condition"Status

"Command" Receivable

"Read-Command"Acceptable

"Good"Status

Figure 7 Initialization Sequence

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XM-7002B Rev.1.0

5.3. Standby mode

Figure 8 shows the standby sequence.

During acces s ldle (Max.24X) ldle (4.4 - 10X)

Read or Seek command

8 s 24 s

Figure 8 Standby Sequence

Rotational speed move onto 4.4 to 10X mode in 8 seconds of the Read or Seek command.

After 24 seconds (default value), it move onto standby mode. (a stop spindle motor)

6. Interface

(1) The interface is based on ATA-SPEC, ATAPI-SPEC SFF-8020i Revision 2.6, SFF-8028 Revision

1.0 and SFF-8090 version 2.

(Small Form Factor Committee Specification of ATA-Packet Interface for CD-ROMs)

(2) 48 types of commands are usable including ATA & ATAPI Commands.

(3) The 128 KByte data buffer handles both high speed and low speed data transmission.

(4) The largest one block size on playback is 2,448 Bytes.

The data length for each block is changeable by command.

(5) Please refer to the standard of ATA/ATAPI-4 for details of the interface timing.

6.1. I/O cable

Table 1 shows the cable parameters.

Cable length

Driver IoL sink current for 5V operation

Driver IoH source current

Cable capacitive loading

Power Supply cablesPIN No.38 - 42(+B),43 - 45(GND)

Min

12 mA

1.5 A

Max

0.46 m

-400 µA

200 pF

Table 1 Cable parameters

6.2.Signal summary

The physical interface consists of single ended TTL compatible receivers and drivers communicating through a 50P-conductor as shown in Figure 9,10 - 13.

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XM-7002B Rev.1.0

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