AT Command Reference Guide for EDGE Wireless ... - wless.ru

Chapter 18 – Hardware-Related Commands
18.6 AT^SSYNC Configure SYNC Pin
Description:
The AT^SSYNC command serves to configure the SYNC pin of the application interface.
Please note that the SYNC pin may be assigned different functions: Depending on the
design of the host application, the pin can either be used to indicate the current
consumption in a transmit burst or to drive a status LED connected to the specified pin.
Before changing the mode of the SYNC pin, carefully read the technical specifications.
Test Command Syntax: AT^SSYNC=
Response:
^SSYNC:list of supported s
OK
Read Command Syntax: AT^SSYNC
Response:
^SSYNC:
OK
Write Command Syntax: AT^SSYNC=
Response:
OK
Parameter Description:
Operation mode of the SYNC pin.
0 SYNC mode:
Enables the SYNC pin to indicate growing power consumption during a transmit burst.
You can make use of the signal generated by the SYNC pin, if power consumption is your
concern. To do so, ensure that your application is capable of processing the signal. Your
platform design must be such that the incoming signal causes other components to draw
less current. In short, this allows your application to accommodate current drain and thus,
supply sufficient current to the GSM engine if required.
1 LED mode:
Enables the SYNC pin to drive a status LED installed in your application.
The coding of the LED is described in Section 18.6.1, ME status indicated by status LED
patterns.
LED mode:
Like =1, but additionally, enables different LED signals in SLEEP mode depending
on the status of PIN authentication and network registration. See AT+CFUN for SLEEP
mode details.
18.6.1 ME Status Indicated by Status LED Patterns
The following table lists the possible patterns of status LED behavior and describes the ME operating status
indicated by each pattern if AT^SSYNC parameter =1 and =2.
Table 18.2: Modes of the LED and indicated ME functions.
LED Behavior ME operating status if AT^SSYNC=1 ME operating status if AT^SSYNC=2
Permanently off ME is in one of the following modes:
POWER DOWN mode, AIRPLANE
mode, SLEEP mode with no wake-up
ME is in the following mode:
POWER DOWN mode and
AIRPLANE mode.
event in progress.
600 ms on / 600ms off Limited Network Service: No SIM card Same as for AT^SSYNC=1
inserted or no PIN entered, or network
search in progress, or ongoing user
authentication, or network login in
progress.
This applies whether the ME works at
full functionality level AT+CFUN=1 or
has entered a “temporary wake-up
state” during one of the CYCLIC SLEEP
modes.
75 ms on / 3 s off IDLE mode: The mobile is registered to Same as for AT^SSYNC=1
the GSM network (monitoring control
channels and user interactions). No call
is in progress.
The same LED pattern applies when
the ME enters a “temporary wake-up
state during one of the CYCLIC SLEEP
modes (e.g., after characters have been
received on the serial interface).
75 ms on / 75 ms off /
75 ms on / 3 s off
One or more GPRS contexts activated. Same as for AT^SSYNC=1
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 230