User's Manual
TC65 Hardware Interface Description
Strictly confidential / Draft
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TC65_HD_V00.450 Page 29 of 96 20.04.2005
3.3.1.3 Reset TC65 via AT+CFUN Command
To reset and restart the TC65 module use the command AT+CFUN. You can enter
AT+CFUN=,1 or AT+CFUN=x,1, where x may be in the range from 0 to 9. See [1] for details.
If configured to a fix baud rate (AT+IPR0), the module will send the URC “^SYSSTART” or
“^SYSSTART AIRPLANE MODE” to notify that it is ready to operate. If autobauding is
enabled (AT+IPR=0) there will be no notification. To register to the network SIM PIN
authentication is necessary after restart.
3.3.1.4 Reset TC65 in Case of Emergency via EMERG_RST
Caution: Use the EMERG_RST pin only when, due to serious problems, the software is not
responding for more than 5 seconds. Pulling the EMERG_RST pin causes the loss of all
information stored in the volatile memory since the processor restarts immediately.
Therefore, this procedure is intended only for use in case of emergency, e.g. if TC65 does
not respond, if reset or shutdown via AT command fails.
The EMERG_RST signal is available on the application interface. To control the
EMERG_RST line it is recommended to use an open drain / collector driver.
To actually reset the TC65 module, the EMERG_RST line must be pulled to ground for
≥10ms. After releasing the line TC65 will start again.
After hardware driven restart, notification via “^SYSSTART” or “^SYSSTART AIRPLANE”
URC is the same as in case of restart by IGT or AT command. To register to the network SIM
PIN authentication is necessary after restart.