Siemens Brodersen MC55 AT - Manual (Page 437)

MC55_ATC_V04.00 Page 437 of 475 3/17/06
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18.6 AT^SSYNC Configure SYNC Pin
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
pin as specified in [2] . For detailed information on the SYNC pin and its LED functionality refer to [2] . Before
changing the mode of the SYNC pin, carefully read the technical specifications.
Syntax
Parameter Description
Operation mode of the SYNC pin. Setting is stored non-volatile.
0
(D) SYNC mode:
Enables the SYNC pin to indicate growing power consumption during a trans-
mit 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
according to the specifications provided in [2] .
The coding of the LED is described in Section 18.6.1 , ME status indicated by
status LED patterns .
Test Command
AT^SSYNC=?
Response(s)
^SSYNC:
list of supported
<mode>
s
OK
Read Command
AT^SSYNC?
Response(s)
^SSYNC: <mode>
OK
Write Command
AT^SSYNC= <mode>
Response(s)
OK
Reference(s) PIN ASC0 ASC1 MUX1 MUX2 MUX3 Charge  Last
SIEMENS ! % % % % % ! ! !
<mode>
(num)