At^ssync Configure Sync Pin - Siemens TC37 Module At Command Reference

AT Command Set

6.39 AT^SSYNC Configure SYNC Pin

The ^SSYNC command serves to configure the SYNC pin of the GSM engine's ZIF connector.
Please note that the pin may be assigned different functions, depending on the design of the host
application. TC35 Terminal supports only <mode>=1.
For detailed information on the SYNC pin refer to the "Hardware Interface Description" supplied with
your GSM engine. Before changing the mode of the SYNC pin, carefully read the technical
specifications.
Test command Response
^SSYNC: (list of supported <mode> s) OK
AT^SSYNC=?
Parameter:
Read command Response
+SSYNC: <mode> OK
AT^SSYNC?
Parameter:
Write command Response
OK
AT^SSYNC=
<mode>
Parameter
Note
<mode>
Note The SYNC pin mode is stored to the non-volatile Flash memory, and thus retained
after Power Down.
Table 10: LED display modes of the ME (if <mode> = 1
LED mode
*)
Off
600 ms On / 600ms Off
*)
75ms On / 3s Off
On
*)
LED Off = SYNC pin low. LED On = SYNC pin high (if LED is connected as described in [1])
TC3X_ATC_01_V04.00
See write command
See write command
0 TC35 / TC37 module: 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 accomodate current drain and
thus, supply sufficient current to the GSM engine if required.
TC35 Terminal: not applicable (do not select mode 0).
1 Enables the SYNC pin to control a status LED. On the TC35
Terminal, this is the LED placed on the front panel. If you use the
TC35 or TC37 module, the SYNC pin can control an LED installed
in your application. The options described below are applicable
both to the module and the terminal.
Note: Mode 1 is the default mode for the TC35 Terminal.
Function
TC35/TC37: ME is off, in SLEEP, Alarm or Charge-only mode.
TC35 Terminal: ME is off or in SLEEP mode.
*)
No SIM card inserted or no PIN entered, or network search in
progress, or ongoing user authentication, or network login in progress.
Logged to network (monitoring control channels and user interactions).
No call in progress.
Voice call: Connected to remote party.
Data call: Connected to remote party or exchange of parameters while
setting up or disconnecting a call.
Page 179 of 204 29.05.2002