MC45 Hardware Interface Description
P R E L I M I N A R Y
MC45_HD_01_V00.02a
Page 39 of 90
12.08.2002
3.3.2.5 Wake up MC45 from SLEEP mode
A wake-up event is any event that switches off the SLEEP mode and causes MC45 to return
to full functionality. In short, it takes MC45 back to AT+CFUN=1.
Definitions of the state transitions described in Table 10:
Yes = MC45 exits SLEEP mode.
No = MC45 does not exit SLEEP mode.
Table 10: Wake-up events in NON-CYCLIC and CYCLIC SLEEP modes
Event
From SLEEP mode
AT+CFUN=0 to
AT+CFUN=1
From SLEEP mode
AT+CFUN=5 or 6 to
AT+CFUN=1
From SLEEP mode
AT+CFUN=7 or 8 to
AT+CFUN=1
Ignition line
No
No
No
/RTS0 or /RTS1 (falling edge) Yes
No
No
Unsolicited Result Code
(URC)
Yes
Yes
No
Incoming voice or data call
Yes
Yes
No
Any AT command
(incl. outgoing voice or data
call, outgoing SMS)
Not possible
(UART disabled)
No
No
Incoming SMS depending on
mode selected by AT+CNMI:
AT+CNMI=0,0 (= default, no
indication of received SMS)
AT+CNMI=1,1 (= displays
URC upon receipt of SMS)
No
Yes
No
Yes
No
No
GPRS data transfer
Not possible
(UART disabled)
No
No
RTC alarm
Yes
Yes
No
AT+CFUN=1
Not possible
(UART disabled)
Yes
Yes
Recommendation:
·
In NON-CYCLIC SLEEP mode, you can set an RTC alarm to wake up MC45 and return
to full functionality. This is a useful approach because, in this mode, the AT interface is
not accessible.
