Chapter 3 – Electrical Characteristics
Multi-Tech Systems, Inc. MMCModem GPRS Developer’s Guide (S000445D)
17
ON / ~OFF Electrical Interface
This input is used to switch the MMCModem ON or OFF. A high level signal has to be
provided on the ON/~OFF pin to switch on the modem. The level of the voltage of this signal
has to be maintained to VCC during a minimum time of 1 second. When powered off, the
shutdown current is roughly 60 microamperes.
ON / OFF Pin Description
Signal
Pin #
I/O
I/O Type
Description
ON / ~OFF
15
I
CMOS
Modem Power ON/OFF
Power OFF Procedure
In order to power OFF the MMCModem, switch it OFF both via software (AT+CPOF; see AT
Command Manual for more details) and via hardware line.
Power-Off Procedure 1
Power-Off Procedure 2
