Power-On And Power-Off Time Sequence; Overview; Power-On Time Sequence - Huawei MG323 Hardware Manual

HUAWEI MG323 GSM M2M Module
Hardware Guide

3.4 Power-On and Power-Off Time Sequence

3.4.1 Overview

The power-on, power-off, and reset control parts of the B2B interface of the MG323
module includes power-on/power-off interface signal (TERM_ON) and the hardware
reset interface signal (RESET). Table 3-2 lists the definitions of the interface pins.
Table 3-2 Definitions of pins of the power-on/power-off and reset interfaces
Pin No.
20
22

3.4.2 Power-On Time Sequence


Make sure that the MG323 module is powered on at the voltage and working
temperature in the recommended range. Otherwise, the module may get
damaged or work improperly.
 External application interfaces must be powered on after the module is powered
on.
You can power on the MG323 module through the TERM_ON interface. The software
will report relevant information according to the actual settings after the module is
powered on. For example, the AT command automatically reports ^SYSSTART[1]. In
this case, the external VIO interface is enabled and supplies 2.8 V power.
Figure 3-3 shows the power-on time sequence.
Issue 04 (2011-08-22)
[1] For specific setting information about the power-on/power-off software, see the
MG323 GSM M2M Module AT Command Interface Specification.
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Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
Signal Name I/O
TERM_ON I
RESET I
Description
Pin for controlling power-on and
power-off
Pin for resetting the hardware
HUAWEI
15