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TC63_ATC_V00.490

Page 40 of 501

5/24/05

Confidential / Draft - Do not copy

The 

 command serves to control the functionality level of the ME. It can be used to reset the ME, to

choose one of the SLEEP modes or to return to full functionality.

Intended for power saving, SLEEP mode reduces the functionality of the ME to a minimum and thus minimizes

the current consumption. SLEEP mode falls in two categories: 
• NON-CYCLIC SLEEP mode 

=0 

• and CYCLIC SLEEP modes, selectable as 

= 7 or 9. 

NON-CYCLIC SLEEP mode permanently blocks the serial interface. The benefit of the CYCLIC SLEEP mode is

that the serial interface remains accessible and that, in intermittent wake-up periods, characters can be sent or

received without terminating the selected mode. This allows the ME to wake up for the duration of an event and,

afterwards, to resume power saving. Please refer to Section 

 for a

summary of all SLEEP modes and the different ways of waking up the module.

For CYCLIC SLEEP mode both the ME and the application must be configured to use hardware flow control.

This is necessary since the CTS signal is set/reset every 0.9-2.7 seconds in order to indicate to the application

when the UART is active. The default setting of hardware flow control is 

0 which must be altered to 

For use after restart you are advised to add it to the user profile saved with 

If both interfaces ASC0 and ASC1 are connected, hardware flow control must be set in either application. 

The 

 test command returns the values of the supported parameters. 

The 

 read command returns the current functionality value. 

The 

 write command can be used to reset the ME, to choose one of the SLEEP modes or to return to

full functionality. 

Test Command

AT+CFUN=?

Response(s)

+CFUN: 

(list of supported 

s) , (list of supported 

s)

OK

Read Command

AT+CFUN?

Response(s)

OK

Write Command

AT+CFUN=

[

[, 

]]

Response(s)

OK

ERROR

+CME ERROR

Reference(s)

PIN

ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge

4

Last

GSM 07.07

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