IGM SLM24xxProductSpecV1_23

IGM SLM24xxProductSpecV1_23
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
Introduction
Wintec’s SLM2456/33/14/03 embedded modem is based on Silicon Laboratories’ ISOmodemTM chipset,
which consists of a Si2456/33/14/03 modem DSP chip and an integrated direct access arrangement (DAA).
The modem uses AT command set to control the functionality of modem and its internal register settings. It
can be easily integrated into a host to provide a low cost communication link to the outside world. The
direct access arrange (DAA) device in the modem is programmable to meet international telephone line
interface requirements, with compliance to FCC, CTR21, and other country specific PTT specifications,
such as AC/DC termination, ring impedance, on-hook/off-hook intrusion detection, caller ID, loop
voltage/loop current monitoring, over-current detection, ring detection, and the switch-hook function.
The modem is assembled in a 40-pin Dual-in-Line (DIP) form factor and thus can be referred to as a “DIP
modem”. The footprint of Wintec’s “DIP” modem is only 2”x1” and is one of the most concise embedded
modems that meet global telephone line standards. The DIP pins are placed on the common 0.1” grid.
The SLM2456/33/14/03 modem is a DSP-based hardware modem. It is not a soft modem and is independent
of the host processors. Different from competitors’ half-built modems, Wintec’s SLM2456/33/14/03
modem has all safety devices built-in, such as Fuse, SiDactor, notch filter, etc. User does not need to add
any external safety component, except an RJ-11 connector to the product chassis. Standard UART
(Universal Asynchronous Receiver Transmitter) driver is used to drive the modem if used in serial mode.
Protocol and Baud Rate
Besides being able to operate at the maximum connection rates of 56Kbps, 33.6K bps, 14.4K bps, and 2.4K
bps for SLM2456, SLM2433, SLM2414, and SLM2403 respectively in full-duplex mode, all SLM24xx
modems support ITU-T fall-back modes. More specifically,
SLM2456 DIP modem is V.90 compliant, with automatic fallback capability
(56 kbps to 300 bps).
SLM2433 DIP modem is V.34 compliant, with automatic fallback capability
(33.6kbps to 300 bps).
SLM2414 DIP modem is V.32bis compliant, with automatic fallback capability (14.4 kbps to 300 bps).
SLM2403 DIP modem is V.22bis compliant, with automatic fallback capability (2.4K bps to 300 bps).
The protocol and baud rate supported by SLM24xx modems are summarized as follows:
Features
SLM24xx (commercial)
SLM24xx-I (industrial)
Serial Mode Operation
All
All -I
Parallel Mode Operation
All
All -I
V.42
All
All -I
V.42bia Data Compression
SLM24 56/33/14
SLM24 56/33/14 -I
MNP2-4 Error Correction
All
All -I
MNP5
Data Compression
SLM24 56/33/14
SLM24 56/33/14 -I
V.90
56K bps Maximum
SLM24 56
SLM24 56-I
V.34
33.6K bps Maximum
SLM24 56/33
SLM24 56/33 -I
V.32bis 14.4K bps Maximum
SLM24 56/33/14
SLM24 56/33/14 -I
V.32
SLM24 56/33/14
SLM24 56/33/14 -I
Error Correction
9.6K bps Maximum
V.23
1200 bps
SLM24 56/33/14
SLM24 56/33/14 -I
V.22bis
2.4K bps Maximum
All
All -I
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 1
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
Bell212A 1200 bps
All
All -I
V.21
300 bps
All
All -I
Bell 103 300 bps
All
All -I
Note: All = SLM2456 / SLM2433 / SLM2414 / SLM2403
All-I= SLM2456-I / SLM2433-I / SLM2414-I / SLM2403-I (“-I” means industrial grade)
The modems also support V.42 and MNP2-4 error correction and V.42bis and MNP5 compression protocol,
except for SLM2403. The SLM2403 modem supports modulations and protocols of Bell 103, V.21,
Bell212A, and V.22bis. Extended AT commands are used to set various baud rates.
The error correction protocol ensures error-free delivery of asynchronous data sent between the host and the
remote end. The error control is based on grouping the data into frames with checksums determined by the
contents of each frame. The receiving modem checks the frames and sends acknowledgements to the
transmitting modem. When it detects a faulty frame, the receiving modem requests a re-transmission.
Frame length varies according to the amount of data transmitted or the number of re-transmissions requested
from the opposite end.
The use of asynchronous compression protocol enables the SLM24xx modem to achieve DTE (Data
Terminal Equipment, host-to-modem) speeds greater than the maximum line (modem-to-modem) speed.
With the support of ITU-T V.42bis compression protocol, the SLM24xxP modem can be operated at
maximum DTE rate up to 307.2 kbps under the standard UART format. Upon power-up, the serial UART
interface defaults to 19.2 kbps baud rate. If the SLM243xx modem is unable to negotiate a V.42 link with a
remote modem, it will fall back to wire mode. Error correction (ITU-T V.42) and data compression (ITU-T
V.42bis) are not active in wire mode.
The UART interface synchronizes on the start bits of incoming characters. It then samples the data bit field
and stop bits. The UART interface can accommodate character lengths of 8, 9, 10, and 11 bits, giving data
fields of 6, 7, 8, or 9 bits. The default character length is 8-bit.
Meet Global Telephone Standards
Wintec’s SLM24xx modem has been tested and passed major homologations for global applications:
(a)
(b)
(c)
(d)
(e)
(f)
FCC Part 68
FCC Part 15
IC-CS03
CTR21
CE marking
UL certification
CTR21 is a consortium of 21 countries that have developed a common PTT (Post Telegraph & Telephone)
modem specifications. CTR21 includes the following countries: Austria, Belgium, Cyprus, Denmark,
Finland, France, Germany, Greece, Iceland, Ireland, Israel, Italy, Liechtenstein, Luxembourg, Netherlands,
Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom.
FCC includes the following countries: Caribbean, Central America, China, Hong Kong, Malaysia, Mexico,
Saudi Arabia, South American, Taiwan, United Arab Emirates, and the United States.
Dual Mode Supports
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 2
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
Wintec’s SLM2456/33/14/03 DIP modem can operate in either parallel mode or serial mode. The interface
to the host is configurable either as a serial UART interface with flow control or as an 8-bit parallel
interface. The parallel mode interface has an 8-bit data bus and a single bit address A0, which is used to
access either Parallel Interface Register 0 (A0=0) or Parallel Interface Register 1 (A0=1). The parallel
mode interface is written or read by the host in blocks by way of a 14-character deep transmit FIFO or a 12character deep receive FIFO. By polling the bit7 (RXE) and bit6 (TXE) of Parallel Interface Register 1, the
FIFOs can be guaranteed to never full/empty at all transfer rates. The INT# pin can be used to indicate FIFO
full or empty if without the use of polling. On detecting off-hook intrusion, the modem alerts the host of
such condition via the same INT# pin.
The selection of serial or parallel interface is determined by the state of a designated pin (AOUT/INT# pin)
at the modem interface during the rise of RESET#.
An internal 50-Kohm pull-up resistor at the
AOUT/INT# pin sets the modem default state to serial mode operation. An external pull-down resistor of
10K-ohm can be connected to the AOUT/INT# pin to select the parallel mode operation. The CS# signal
should remain high until after the rise of RESET#. In parallel mode, the DIP pins are configured as an 8-bit
data bus and a single address bit, besides chip select, read/write controls, and interrupt signal. The single
address bit is for the access of two control registers in the modem DSP chip.
Additional Features
Additional features of the SLM2456/33/14/03 DIP modem are:
1. Caller ID detection. The DIP modem can detect the first ring burst signal and echo it to the host for
caller ID decode.
2. Over-current protection, up to 70V and 200mA. The over-current protection is to protect the DIP
modem from being accidentally plugged into a digital phone line. Many digital PBX lines have a low
impedance, high current voltage source cross the two terminals of an RJ-11 jack that is normally TIP
and RING on an analog phone line. When an analog modem is plugged into a digital line, it goes off
hook and draws excessive current to damage the hook switch components. Wintec’s DIP modem can
detect the over-current condition to generate an interrupt for the host to force the modem into high
impedance mode or on-hook before damage occurs.
3. Parallel phone detection. The DIP modem can detect when another telephone, modem or other device
is using the phone line.
4. Sleep mode. The DIP modem will enter the sleep state after a pre-programmed time of inactivity to
save power. It awakes on ring.
5. Power down mode. Once the PDN bit in the control register is written, the DIP modem will enter
power down mode. It can be powered back through the assertion of RESET# pin.
6. Error correction protocol minimizes potential error during data delivery between the host and a
remote end.
7. The DIP modem accepts basic AT command set, along with many of the enhanced AT commands. A
complete list of AT command set is available in the Programmer User Guide.
8. The DSP chip DIP modem contains an on-chip program ROM that includes firmware for all features
associated with the modem. In addition, the DSP chip contains on-chip program RAM to
accommodate changes to the ROM firmware. This provides support for future firmware updates to
those modem already deployed in the field.
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 3
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
Power-on State
On reset, the SLM2456/33/14/03 modem defaults to command mode and accepts AT commands. All
register settings are reverted to the default values stored in the program memory residing in the modem
chipset. After the device is configured, an outgoing modem call can be made by way of the ATDT# (tone
dial) or ATDP# (pulse dial) command. If handshake is successful, the modem replies with a response code
and immediately enters data mode. The "ATO" command can also be used to enter data mode. In data
mode, AT commands are no longer accepted. The modem reverts to command mode if the modem
connection is terminated, or through the use of +++ escape sequence.
Power Consumptions
Depending upon the state the SLM24xx is in, it consumes different powers under 3.3V supply voltage.
Communicating Mode
26mA nominal
35mA maximum
Sleep Mode (wake up on ring)
3 mA nominal
5mA maximum
Power Down Mode (wake up on reset)
35uA nominal
100uA maximum
The DAA section draws power from the phone line and does not consume power from the system.
The absolute maximum current for SLM2456/33/14/03 digital input pin is +/- 10 µA. The current rating for
all output pins is +/- 2mA (output pads are 2mA driver).
Operating Conditions:
Ambient Temperature (TA):
Minimum 0 oC Typical 25 oC Maximum 70°C (commercial grade)
Minimum -40oC
Maximum 85oC (industrial grade)
Si2433/14 Digital Supply Voltage Minimum 3.0V Typical 3.3V Maximum 3.6V (pin is 5V tolerant)
The Si2456/33/24/03 DSP interface supports 5V logic (5V tolerant), except the XTALI/CLKIN input pin
which supports 3.3V only. The absolute maximum voltage for digital input is –0.3V to 5.3V.
All un-used input pins of SLM2456/33/14/03 should be tied to known, idle state externally while the unused output pins are left open.
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 4
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
Interface Configuration for Serial Mode Operation
VDD=3.3V
UART
Interface
Host
uC
TXD
RXD
RTS
CTS
DCD
ESC
RI
INT#
Isolation
Capacitor
C1A
C1B
Si3015
DAA
Line
Protection
Circuitry
TIP
RING
Si2456/33/14/03
DSP
XTLI
4.9152MHz
Reset
Circuit
RESET#
Speaker
XTLO
Audio
Circuit
CLKOUT AOUT
SLM2456/33/14/03
A 0.1uF capacitor
at AOUT is a must
Pin Connection at Serial Mode:
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
Pin 10
Pin 11
Pin 12
Pin 13
Pin 14
Pin 15
Pin 16
Pin 17
Pin 18
Pin 19
Pin 20
TIP
RING
NC (no connect)
NC (no connect)
NP (no pin)
NP
NP
NP
NP
NP
NP
CLKOUT (open, if un-used)
RFU (tied to GND, if un-used)
VDD (3.3V)
GND
RTS
RXD
TXD
CTS
RESET#
Pin 40
Pin 39
Pin 38
Pin 37
Pin 36
Pin 35
Pin 34
Pin 33
Pin 32
Pin 31
Pin 30
Pin 29
Pin 28
Pin 27
Pin 26
Pin 25
Pin 24
Pin 23
Pin 22
Pin 21
NC (no connect)
NC (no connect)
NC (no connect)
NC (no connect)
NP (no pin)
NP
NP
NP
NP
NP
NP
RFU (tied to GND, if un-used)
DCD
ESC (tied to GND, if un-used)
VDD (3.3V)
GND
RFU (open, if un-used)
RI
INT# (open, if un-used)
AOUT (open, if un-used)
The connection order of TIP and RING is exchangeable. A polarity rectifier in SLM2456/33/14/03 can
automatically correct the polarity of TIP and RING before being input to DAA.
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 5
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
Serial Mode Interface Signal Description:
The serial mode interface can be directly connected to an UART in the host or to a RS232 interface though a
level conversion IC. RS stands for “recommended standard”. The original standard was established before
the days of TTL logic, it is not a surprise to see the standard does not use 5V/3.3V and ground logic level.
Instead, a high level for driver output is defined as +5 to +15V and a low level for driver output is defined as
being between -5 and -15V. The receiver logic level was defined to have a 2V noise margin. As such, a
high level for the receiver is defined as +3 to +15V and a low level is -3 to -15V. For RS-232
communication, a low level (-3 to –15) is defined as a logic 1 and is referred to as “marking”. Likewise, a
high level (+3 to +15V) is defined as a logic 0 and is referred as “spacing”. The flow control signal in serial
interface is asserted if it is in logic 0 state. There is no “#” or “~” symbol appended to the serial interface
signal to indicate it is asserted in logic 0 to avoid confusion. The serial mode interface signals in SLM24xx
modems are:
TXD: Transmitted Data; generated by DTE (PC or host), received by DCE (modem).
RXD: Received Data; output by DCE, received by DTE.
RTS: Request to Send. When DTE is ready to transmit data to DCE, RTS is turned on (“ON” refer to
a high in RS-232, or logic “0”). An “ON” condition maintains the DCE in receive mode. After
RTS is asserted, the DCE must assert CTS (Clear to Send) before communication commence.
CTS: Clear To Send. CTS is used along with RTS to provide handshaking between the DTE and the
DCE. After the DCE sees an asserted RTS, it turns CTS ON when it is ready to communicate.
DSR: Data Set Ready. DSR is turned on by DCE to indicate it is connected to telecommunication line.
DCD: Data Carrier Detect. DCD is turned on when DCE is receiving a signal from a remote DCE.
This signal remains ON as long as a suitable carrier signal can be detected. SLM24xx modem
asserts DCD after it receives a carrier signal from a remote modem
DTR: Data Terminal Ready. DTR indicates the readiness of DTE. This signal is turned ON by DTE
when it is ready to transmit or receive data from the DCE.
RI:
Ring Indicator. When RI is asserted, it indicates that a ringing signal is being received on the
communication channel.
ESC: Escape. A level-sensitive input pin. A high to this pin returns the modem to Command mode.
In the 9-bit data transfer (9N1), a 1 detected on the 9th data bit also returns the modem to
Command mode if such function is enabled via the \B6 AT commands. The escape sequence
“+++” can returns modem to Command mode too.
INT#: Active low interrupt to host.
Timing Requirement:
TXD
8-bit Data
(8N1; default mode)
CTS
Start
D0
D1
D2
D3
D4
D5
D6
D7
TCTSB
Stop
TCTH
TCTSB= CTS asserted (falling edge) to Start bit asserted (falling edge) = 10 nS minimum.
TCTH = Stop bit to CTS de-asserted (rising edge)= 1/(2*bard rate) typically.
RXD
(8N1; default mode)
Start
D0
D1
D2
D3
D4
D5
D6
D7
Stop
TRTS TRTH
RTS
TRTS= RTS setup time to Start bit asserted (falling edge) = 10 nS minimum.
TRTH= RTS hold time with respect to the falling edge of Start bit = 1/(2*bard rate) typically.
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 6
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
Parallel Mode Interface
VDD=3.3V
Host
uC
WR#
RD#
D[0:7]
A0
CS#
Isolation
Capacitor
C1A
Line
Protection
Circuitry
C1B
Si3015
DAA
INT#
TIP
RING
Si2456/33/14/03
DSP
Reset
Circuit
XTLI
RESET#
4.9152MHz
XTLO
GND
SLM2456/33/14/03
Parallel Mode Pin Connection:
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
Pin 10
Pin 11
Pin 12
Pin 13
Pin 14
Pin 15
Pin 16
Pin 17
Pin 18
Pin 19
Pin 20
TIP
RING
NC (no connect)
NC (no connect)
NP (no pin)
NP
NP
NP
NP
NP
NP
A0
D6
VDD (3.3V)
GND
D7
RD#
WR#
CS#
RESET#
Pin 40
Pin 39
Pin 38
Pin 37
Pin 36
Pin 35
Pin 34
Pin 33
Pin 32
Pin 31
Pin 30
Pin 29
Pin 28
Pin 27
Pin 26
Pin 25
Pin 24
Pin 23
Pin 22
Pin 21
NC (no connect)
NC (no connect)
NC (no connect)
NC (no connect)
NP (no pin)
NP
NP
NP
NP
NP
NP
D5
D4
D3
VDD (3.3V)
GND
D2
D1
D0
INT#
Parallel Mode Interface Signal Description
D[7:0] :
A0
:
CS# :
WR# :
RD# :
INT# :
8-bit data bus
1-bit address bus
active low chip select.
active low write control pulse
active low read control pulse
active low interrupt. The INT# pin in parallel model operates differently than in serial mode.
In parallel mode, the INT# pin is used to control FIFOs. The INT# is automatically asserted to
host on Receive FIFO full or Transmit FIFO empty to ensure no FIFO overflow or underflow.
RESET#: active low reset pulse.
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 7
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
Parallel Mode Timing Diagram
Parallel Interface Read Timing
tCSH = CS# hold time = 0nS minimum
CS# setup time = 10nS minimum
CS#
tAS= Address setup time = 15nS minimum
tAH = Address hold time= 0nS minimum
A0
RD#
Address= 0 or 1
RD# Pulse low
50nS minimum
tRC = Read Cycle time=120nS minimum
tDH = Data hold time = 10nS minimum
Data
D[7:0]
tACC = RD# asserted to Data valid
= 20nS maximum
Data
tDZ = RD# high to Data tristate time=30nS maximum
The minimum CS# pulse low width is the sum of CS# set up time with respect to RD# going low and the
width of RD# low. The sum is 60nS. A port pin from an external micro-controller can be used to drive the
CS# pin. Thus, the minimum cycle time is 120nS, i.e. twice of the minimum width of CS# low. Each data
transfer between the SLM24xx and the host can be done in two host bus cycles.
Parallel Interface Write Timing
tCSH = CS# hold time = 0nS minimum
CS# setup time = 10nS minimum
CS#
tAS= Address setup time = 15nS minimum
tAH = Address hold time= 0nS minimum
A0
WR#
Address= 0 or 1
WR# Pulse low
50nS minimum
twC = Write Cycle time=120nS minimum
tDH= Write data setup time = 20nS
tDH= Data hold time = 10nS minimum
Data
D[7:0]
Data
TWDSU = write Data setup time
= 20nS minimum
The minimum CS# low pulse is 60nS. The minimum write cycle time is 120nS. A host port can be use to
drive the parallel mode control signals. Because of separate address and data bus, it takes only two host bus
cycles to complete a write data transfer from the host to the SLM24xx modem.
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 8
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
Audio Circuit Reference Design
An external speaker circuit can be connected to the AOUT pin in serial mode to monitor the call-progress
signals, such as dial tone, DTMF dialing, ring, busy signal, and modem negotiation. Enable or disable of this
signal is provided by way of AT commands and register settings. It is extremely important to note that
AOUT cannot be used to directly drive an external Audio Amplifier, such as National LM386M-I. Both
inputs (V+ and V-) to the bipolar differential pair of LM386M are biased to ground with a 50KΩ resistor.
The voltage divider between the AOUT internal pull-up resistor and the input bias resistor in external audio
amplifier can result in an undetermined state in selecting a parallel or a serial mode operation. An isolation
capacitor between AOUT and external audio amplifier is required. A reference design for AOUT is shown:
3.3V
5V
SLM24xx
C3
0.1uF
C2
0.1uF
R3
47K
6
1
3
21 AOUT
C4
100uF
7
R4
3K
2
4
8
C5
0.1uF
Speaker
C6
820pF
LM386M-1
R5
10 Ω
In serial mode operation, AOUT is a digital audio PWM output. In the audio circuit, C2 provides a DC
blocking for AOUT. It also prevents SLM24xx modem from accidentally running into parallel mode by
external pull-down resistor, such as R4. R3 and R4 form a voltage divider to charge the capacitor C6. The
voltage level at C6 is applied to the V+ input of Audio Amplifier, such as National Semiconductor LM386,
while the V- input is tied to ground. With differential inputs being ground-referenced, the output is biased
to one-half the supply voltage (Vcc =5V). The pins 1and 8 of LM386 are open. An internal 1.35KΩ
resistor between these two pins sets the gain at 20. C3 is a power supply bypass capacitor and should be
located as close to the power supply pin of LM386 as possible. C5 and R5 form a compensation circuit to
prevent the oscillation of the high-current PNP transistor in the LM386 output stage on negative signal
peaks. These oscillations can occur between 2MHz-5MHz and can pose a radiation compliance problem if
C5 and R5 are omitted. C4 provides a DC blocking for the output of LM386, which is biased at
approximately 2.5V(Vcc/2) and forms a high-pass filter with the impedance of loudspeaker.
RESET Circuit Reference Design
User can also use a reset chip (such as Dallas Semiconductor DS1818 for 3.3V Vcc supply) to generate a
reliable reset signal for the modem to use.
3.3V
VCC
RST#
RESET#
GND
DS1818
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 9
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
HyperTerminal Applications
Any standard terminal communication program such as HyperTerminal under Microsoft Windows can be
used to evaluate the AT command sets for SLM24xx modem. Wintec SLM24xxEVB evaluation board can
be connected to any PC as a standard serial modem. The following procedure can be used to set up
HyperTerminal:
a.
Check if HyperTerminal is installed in your PC. If not, see HELP on Windows Operating System
for HyperTerminal installation.
Start -> Program -> Accessories -> Communications -> HyperTerminal
When the HyperTerminal is open for the first time, the application will ask for a title for storing all
parameters you want to key in.
After a title is given, there will be a prompt for the COM port to be used. Choose the
corresponding port (COM1 is recommended). And then the port setting will be asked. Configure
the terminal emulation program to 19200 bps, 8 data bits, no parity, one stop bit, and hardware
(CTS) handshaking.
b.
With the terminal program properly configured and running, type “AT<cr>” inside the terminal
window and the modem should return “OK”, indicating the modem is working in the command
mode and communicating with the terminal. If the “OK” response is not received, try resetting the
modem by pressing the manual reset switch (S1) then again type “AT<cr>”. If not working, check
if the right COM port is selected and make sure a correct Port setting is entered.
c.
If there is no line-feed after the “OK” response, click File->Properties. In properties panel, choose
Setting. In Setting panel, choose ASCII setup.. In ASCII panel, click the append linefeeds to
incoming lines. Click OK,OK. You are now talking to one modem with the PC.
d.
Use similar procedure to setup other modem with a different COM port.
e.
Once the second modem is set up, the user can choose either one of the modems as the ANSWER
modem.
f.
If the evaluation board is chosen as the ANSWER modem, type “ATI6<cr>”. The modem should
respond with “2456”, “2433”, “2414”, or “2403”, indicating the terminal is communicating with a
SLM2456/33/14/03 DIP modem.
g.
Type “ATS0=2<cr>”. It means answer the phone after the second ring.
h.
To take the modem off-hook, type “ATH1<cr>”. The modem should go to the off-hook state, draw
loop current, and respond with an “OK”.
i.
Next type “ATH<cr>” or “ATH0<cr>” and the modem should hang-up (go on-hook) and stop
drawing loop current.
j.
To make a modem connection, type “ATDT(called modem phone number)<cr>”. Once the
connection is established, a “CONNECT” message will appear indicating the two modems are in
the data mode and communicating. Typing on one terminal should appear on the other terminal.
k.
To return to the command mode without interrupting the connection between the two modems, type
“+++”. Approximately two seconds later, “OK” will appear. The modem is now in command
mode and will accept “AT” commands.
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 10
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
Note: The +++ escape sequence is disabled at power up or at reset. ATS14=20 enables +++ escape.
S-Register address and values are entered in hex (e.g. ATS0F=2B).
l.
To return to the data mode, type “ATO<cr>”. The modem will resume the data connection and no
longer accept AT commands.
m. Type “ATH<cr>” (or “ATH0<cr>”) to terminate the data connection.
n.
AT commands are required to enable the speaker:
ATSF4=00 removes TDX and RDX audio mute.
ATM2 turns on speaker continuously.
ATM1 turns on speaker until carrier is established.
ATM0 Disable speaker.
A partial list of other commonly used AT commands are:
AT
ATA
ATDT101
ATH0
ATH1
The attention command prefix, a set/reset command.
Answer
Dial the number (101)
Forces the modem on-hook. Hangs up the modem’s connection to the telephone line.
Forces the modem off-hook.
ATI
ATO
ATS0=1
ATX0
AT*Y1D2
Information - asks the modem for its product ID code.
Goes online. The ATO command is used to re-enter Data mode.
Set number of rings (1) before answering
Blind dial – no dial tone necessary.
Send continuous DTMF digit (2).
A/
Repeat last command
The A/ command instructs the modem to repeat the last command line. A command line
termination character is not required for the execution of this command (that is, the
command is executed as soon as the slash is typed).
+++
Return to command state (escape sequence)
The escape sequence is used to force the modem back to local command state from on-line
state. Do not type any other commands or make entries before or after the escape sequence
for a period equal to the guard time set in register S12 (default is one second).
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 11
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
SLM2456/33/14/03 DIP Modem Pin Diagram
TIP
RING
NC
NC
1
2
3
4
40
39
38
37
RFU
RFU
RFU
RFU
SLM24xx
DIP Modem
CLKOUT / A0
NC / D6
VDD
DGND
RTS# / D7
RXD / RD #
TXD / WR#
CTS # / CS #
RESET#
29
28
27
26
25
24
23
22
21
12
13
14
15
16
17
18
19
20
RFU(SDO) / D 5
DCD# / D4
ESC / D3
VDD
DGND
RFU(SDI) / D2
RI# / D1
INT# / D0
AOUT / INT#
(Serial Mode / Parallel Mode)
Pin 1
Pin 21
Pin 40
Physical Dimensions:
The physical dimension of Wintec’s SLM2456/33/14/03 DIP modem is 2”x 1”x 0.35” (excluding the height
of DIP pin). The detail drawing is shown below.
Pin 1
0.1” (pin pitch)
0.90”
0.05”
Note: minimum height of 0.40” is
available with special instruction.
0.60”
1.00” +/- 0.01”
0.05”
2.00” +/- 0.01”
0.25”
0.10”
0.25”
0.060” +/-0.003”
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 12
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
Modem Header Specification:
(A). Pin Header Specification:
1.
2.
3.
Pin Coating: 3-6 micro-inch gold flash (30 micro-inch gold plating is also available)
Post dimension: 0.025” per side, square pin
Two post lengths are available:
•
•
•
4.
5.
6.
Post length: 0.185” for low profile socket (mate height ranges from 0.245” to 0.200” including
standoff)
Post length: 0.250” for standard socket (mate height ranges from 0.340” to 0.245” including
standoff)
For other different lengths are also available per customer’s request.
Housing insulator: 0.10”
Tail length: 0.057”
Pin pitch: 0.1”
(B). Pin Header Drawing:
Tail length: 0.057”
Housing: 0.10”
Post dimension:
0.025” square
Post length: 0.185”/ 0.250”
(C) Socket:
The mate (socket, receptacle) for DIP pin is a single-in-line socket strip with 0.100” (2.54mm)
centered to match with 0.025” (0.64mm) square mating posts.
Example socket height in low profile: H=0.245” (5.72mm),
including 0.017” standoff.
(stanard profile socket height around 0.340”)
W=0.100” +/-0.005”
Tail length L= 0.115” (2.92mm)
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 13
Wintec SLM2456 / SLM2433 / SLM2414 / SLM2403
Dual-in-Line Embedded Modem Specification
Version 1.23
Evaluation Board
A companion evaluation board is available for customers to evaluate the functionality of DIP modem and
the AT command set used in the Si2456/33/14/03 ISOmodem chipset. It is extremely helpful for customers
to start with the evaluation board.
SLM24xx DIP modem
and companion
evaluation board
Contact Information:
Wintec Industries Inc.
4280 Technology Drive
Fremont, CA 94538
Tel: (510) 360-6300 (main)
(510) 360-6360 (Engineering)
(510) 360-6246 (OEM Sales)
Email: [email protected]
About Wintec Industries, Inc.:
Wintec, founded in 1988, is headquartered in Fremont, California. Wintec, a leading third party memory
module manufacturer, specializes in a variety of module design and manufacturing, such as memory module,
flash module, Handspring module, modem module, game module, etc. Besides a complete line of DDR,
SDR, and EDO/FPM legacy memory modules, Wintec also distribute CPU, motherboard, peripherals, PC
software, and consumer Flash products (such as MMC, SD, SMC, CompactFlash, PC Card, etc.). With
excellent design engineering and manufacturing capability, Wintec provides a wide range of design and
manufacturing services for our valuable customers from concept design to final product delivery. Wintec is
ISO9001-certified.
Important Notice:
Wintec Industries, Inc. makes no representations or warranties with respect to the contents of this User Guide
and specifically disclaims any implied warranties of any product design for any particular purpose. Wintec
Industries, Inc. reserves the rights to revise this publication and to make changes from time to time in the content
hereof without obligation of Wintec Industries, Inc. to notify any person or organization of such revisions or
changes.
Wintec Industries, Inc. 4280 Technology Drive, Fremont, CA 94538 www.wintecind.com
April, 2003 Page 14
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