Siemens TC65 Dokumentacja Pobierz pdf (Strona 33)

TC65 Hardware Interface Description

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TC65_HD_V02.000 Page 33 of 120 08.06.2006

3.3.1.4 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+IPR0), 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.

3.3.1.5 Reset or Turn off TC65 in Case of Emergency

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. 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.

The EMERG_RST line can be used to switch off or to reset the module. In any case the

EMERG_RST line must be pulled to ground for ≥10ms. Then, after releasing the

EMERG_RST line the module restarts if IGT is held low for at least 400ms. Otherwise, if IGT

is not low the module switches off. In this case, it can be restarted any time as described in

Chapter

3.3.1.1.

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.

3.3.1.6 Using EMERG_RST Signal to Reset Application(s) or External Device(s)

When the module starts up, while IGT is held low for 400ms, the EMERG_RST signal goes

low for 120ms as shown in

Figure 5 and Figure 6. During this 120ms period, EMERG_RST

becomes an output which can be used to reset application(s) or external device(s)

connected to the module.

After the 120ms period, i.e. during operation of the module, the EMERG_RST is an input.

Specifications of the input and output mode of EMERG_RST can be found in

Table 26.

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Siemens TC65 Dokumentacja Strona 33