Specifications

AT Command Set
TC35-ATC-01-V02.10 Page 132/145 02.10 / 23.05.2001
6.34 AT^SSYNC Configure SYNC Pin
The ^SSYNC command serves to configure the SYNC pin in the ZIF connector of the GSM engine.
Please note that the pin may have different functions, depending on the type of GSM engine. The
following AT commands apply to the TC35 and TC37 modules and the TC35 Terminal, however the
options available for mode 0 and 1 vary with the model.
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
AT^SSYNC=?
Response
^SSYNC: (list of supported <mode>s) OK
Parameter
See write command
Read command
AT^SSYNC?
Response
+SSYNC: <mode> OK
Parameter
See write command
Write command
AT^SSYNC=
<mode>
Response
OK
Parameter
<mode> 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 TC35 if required.
TC35 Terminal: not applicable (do not select mode 0).
1 Enables the SYNC Pin to control a status LED. On the TC35 Termi-
nal, this is the LED placed on the front panel. If you use a 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.
Operating modes of the ME indicated to the user (if <mode> = 1):
LED
Off
600ms/600 ms On/Off
75ms/3s High/low
On
ME Mode
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 progess.
Logged to a network (therefore monitoring control
channels and user interactions), but no call in pro-
gress.
Voice call: Connected to remote party.
Data call: Connected to remote party or exchange of
parameters between both parties while setting up or
disconnecting a call.
Reference
Siemens
Note