Siemens AC75 Manuel D’Utilisation

s

AC75_ATC_V01.002

Page 496 of 569

10/30/06

Confidential / Released

The 

 command enables the module to be connected to external I²C or SPI devices.

The I²C/SPI  datastream is mapped through an internal I²C/SPI  driver to and from an ASCII hex protocol which

can be exchanged with an internal application (JAVA) or an external application via V24. 

The 

 write command configures and activates the I²C/SPI interface and changes from command mode

into data mode. All values must be given in hexadecimal format (0 - 9, A - F) without "0x". For details on data

mode please refer to Section 

Caution:

I²C and SPI cannot be operated in parallel with USB. The USB interface will be disabled as soon as the I²C or

SPI channel is opened with 

. To activate the USB interface again after closing the I²C or SPI channel

it is necessary to restart the AC75 module, either by switching the ignition line or entering the command

=1,1. The Terminal program or host application connected with the USB interface must be closed

before activating the USB.

If I²C or SPI data mode is active the DCD line of the connected serial port goes high. 

If I²C or SPI are opened from a Java application be sure to close the I²C or SPI channels before Java terminates. 

Test Command

AT^SSPI=?

Response(s)

^SSPI:

(list of supported 

s), (list of supported 

s), (list of supported 

s), (list of supported 

s), (list of supported 

s)

OK

Read Command

AT^SSPI?

Response(s)

, 

OK

ERROR

+CME ERROR: <err>

Write Command

AT^SSPI=

[

[, 

]]]]]

Response(s)

CONNECT
(indicates that ME has entered data mode)
ERROR

+CME ERROR: <err>

Reference(s)

PIN

ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge

4

Last

SIEMENS