Installation Instructions

SIM5216A _HD_V1.02 Hardware Design

SIM5216A _HD_V1.02 26.08.2010

Note1: Ton >= 64ms.

Note2: Commonly, the AT command can be set 2-3S after the SIM5216A is powered on.

If VBAT was supplied to SIM5216A, SIM5216A could be automatically powered on by

connecting the Power ON pin to Low level directly. In automatically powering on mode, it is

suggested that the SIM5216A should reset by RESET pin after power on. Below is the reference

circuit.

Figure 6: Automatic power on

Note: The POWER_ON has been pulled up with a 250kR resistor to VBAT in module. Make

sure that VILmax=0.2*VBAT, and the value of R1 above can be changed as you want.

In automatically powering on mode, it is suggested that the SIM5216A should reset by RESET

pin after power on.

3.4.2 Turn off SIM5216A

Following procedure can be used to turn off the SIM5216A:

z Normal power down procedure: Turn off SIM5216A using the POWER_ON pin

z Normal power down procedure: Turn off SIM5216A using AT command

3.4.2.1 Turn off SIM5216A using the POWER_ON pin (Power down)

You can turn off the SIM5216A by driving the POWER_ON to a low level voltage for period

time. The low level period of the POWER_ON is about 64mS.

This procedure will let the module to be logged off from the network and allow the software to

enter into a secure state and save data before completely disconnecting the power supply.

3.4.2.2 Turn off SIM5216A using AT command

You can use AT command

“AT+CPOF” to turn off the module. This command will let the

module to be logged off from the network and allow the software to enter into a secure state and

save data before completely disconnecting the power supply.

After this moment, the AT commands can not be executed. The module enters the POWER

DOWN mode, only the RTC is still active.

Please refer to AT command manual for details of the AT command

“AT+ CP OF ”.