At^ssync Configure Sync Pin; Me Status Indicated By Status Led Patterns - Multi-Tech MultiModem EDGE Reference Manual

17.4 AT^SSYNC Configure SYNC Pin

Description:
Test Command Syntax:
Response:
Read Command Syntax:
Response:
Write Command Syntax:
Response:
Parameter Description:
<mode>
0
1

17.4.1 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 <mode>=1 and <mode>=2.
During the transition from one LED pattern to another the "on" and/or "off" periods of the LED may vary in length.
This is because an event that triggers the change may occur any time and, thus, truncate the current LED
pattern at any point.
Table 17.2: Modes of the LED and indicated ME functions.
LED Behavior
Permanently off
600 ms on / 600ms off
75 ms on / 3 s off
75 ms on / 75 ms off /
75 ms on / 3 s off
500 ms on / 25 ms off
Permanently on
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G)
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.
AT^SSYNC=?
^SSYNC:list of supported <mode>s
OK
AT^SSYNC?
^SSYNC:<mode>
OK
AT^SSYNC=<mode>
OK
Operation mode of the SYNC pin.
Default. 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.
LED mode:
Enables the SYNC pin to drive a status LED installed in your application.
The coding of the LED is described in Section 17.6.1, ME status indicated by status LED
patterns.
LED mode:
Like <mode>=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.
ME operating status if AT^SSYNC=1
ME is in one of the following modes:
POWER DOWN mode, AIRPLANE
mode, NON-CYCLIC SLEEP mode
- CYCLIC SLEEP mode with no
temporary wake-up event in progress
Limited Network Service: No SIM card
inserted or no PIN entered, or network
search in progress, or ongoing user
authentication, or network login in
progress.
IDLE mode: The mobile is registered to
the GSM network (monitoring control
channels and user interactions). No call
is in progress.
One or more GPRS contexts activated.
Packet switched data transfer in
progress.
Depending on type of call:
Voice call: Connected to remote party.
Data call: Connected to remote party or
exchange of parameters while setting
up or disconnecting a call.
Chapter 17 – Hardware-Related Commands
ME operating status if AT^SSYNC=2
ME is in the following mode:
POWER DOWN mode and
AIRPLANE mode.
1)
Same as for AT^SSYNC=1
Same as for AT^SSYNC=1
Same as for AT^SSYNC=1
Same as for AT^SSYNC=1
Same as for AT^SSYNC=1
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