Siemens AC75 Benutzerhandbuch

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AC75_ATC_V01.002

Page 533 of 569

10/30/06

Confidential / Released

The 

 command allows the application manufacturer to download AC75 firmware into the module by

starting the download process from the host application or a customer-designed download program. The down-

load can be done over the serial interfaces ASC0 or ASC1 or the USB interface. 

For this purpose, the AC75 firmware update file must be available in the format *.USF. The file can be requested

from Siemens. The firmware file consists of records to be transferred one by one from the host application to the

module. 

This manual only describes the handling of the 

 command. All technical requirements and steps to pre-

pare the host application for this download solution can be found in the Application Note "Updating Firmware".

An example for developing an appropriate download program is included. 

The 

 write command causes the module to reset and enter the firmware update mode. This will be used

to read previous downloaded firmware data. 

The 

 execute command causes the module to reset and enter the firmware download mode (this may

take some milliseconds). After entering the download mode the module sends the start pattern HEX 0x01

("ANSWER_OK") to the application to indicate its ready state. Next, the application shall start to send the records

of the firmware file. Each record received on the module is acknowledged to the host application. Once all

records are successfully received, the module shuts down automatically. 

If the module is switched on although it has no valid firmware installed, it waits 60s for the 

 command

(or for another download method to be started). If neither the 

 command nor equivalent characters from

another download method are received the module switches off after a 60s timeout. 

If a valid firmware is still installed, but the 

 command is issued without sending any firmware afterwards

the module will stay in ready state. In this case it must be switched off. 

Test Command

AT^SFDL=?

Response(s)

^SFDL:

(list of supported 

OK

Exec Command

AT^SFDL

Response(s)

OK

0x01

Write Command

Response(s)

OK

ERROR

+CME ERROR: <err>

Reference(s)

PIN

ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge

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