Huawei MG323 manual Power-On Time Sequence, Pin for controlling power-on and power-off

Page 19

HUAWEI MG323 GSM M2M Module

 

 

 

Hardware Guide

 

 

Description of the Application Interfaces

Table 3-3Definitions of pins of the power-on/power-off and reset interfaces

 

 

 

 

 

 

 

Pin No.

Signal Name

I/O

Description

 

 

 

 

 

 

 

 

20

TERM_ON

I

Pin for controlling power-on and power-off

 

 

 

 

 

 

 

 

22

RESET

I

Pin for resetting the hardware

 

 

 

 

 

 

 

3.4.2Power-On Time Sequence

Make sure that the MG323 module is powered on at the voltage and operating 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.

[1]For specific setting information about the power-on/power-off software, see the HUAWEI MG323 Series Wireless Module AT Command Interface Specification.

Figure 3-4shows the power-on time sequence.

Figure 3-4Power-on time sequence

 

 

 

 

VBAT

250 ms (min)

 

 

 

 

 

 

 

 

 

 

High-Z

 

 

1s

 

TERM_ON

 

 

 

 

 

 

 

 

 

 

 

Sampling period used to

 

 

 

 

6.6 ms

select Vgpio/Vmem

 

 

 

VIO

2.8 V

 

 

 

6.3 ms

2.3 V

 

 

 

 

 

Vio is set

 

 

 

Fetch Ext

 

130 ms

HW Power-Key

Nominal

Code

 

 

 

Init

SW Debouncing

SW

 

 

 

 

185 ms

 

Issue 06 (2013-06-13)

Huawei Proprietary and Confidential

19

Copyright © Huawei Technologies Co., Ltd.

 

 

Page 18 Page 20
Image 19
Page 18 Page 20
Contents Hardware Guide Issue DateNo Warranty Creation About This DocumentHistory Version Date Chapter DescriptionsVersion Date Chapter Descriptions Updated -3 Recommended Updated .8 Audio InterfaceSpecifications of the antenna interface Contents Electrical and Reliability Features Overview IntroductionFunction Overview Feature DescriptionOverall Description About This ChapterGprs Gprs Class DRX=2DRX=5 DRX=9 SMSCircuit Block Diagram Application Block Diagram2Circuit block diagram of the MG323 module Description of the Application Interfaces B2B Connector InterfaceMin Tpy Max Pin Pin Name Description DC Characteristics NormalLedstatus ResetTermon UART1DCDVbat Power InterfaceOverview VIODCE Pin No Signal Name DescriptionVbat Interface GND VcoinVcoin Interface Power-On and Power-Off Time SequenceVIO Interface Pin for controlling power-on and power-off Power-On Time SequencePin for resetting the hardware Power-Off Time Sequence Signal Control InterfaceReset Pin for network status LED Input Signal Control PinsApplication Device Output Signal Control PinWorking or Network Status Uart Interface Pin No Signal Name Description Feature DirectionDCE data set DCE is ready DCE to DTE Ready Circuit Recommended for the Uart InterfaceDCE receive DTE transmits DTE to DCE Data Serial data DCE data DTE is ready DTE to DCE Terminal readyReset signal of the SIM card Clock signal of the SIM cardPower supply of the SIM card Data signal of the SIM cardCircuit Recommended for the SIM Card Interface Ground signal of the SIM cardAudio Interface 12External circuit for 32 Ω handsets/16 Ω headsets13External circuit for the microphone interface Antenna Interface Antenna InstallationEnvironmental Type Material Condition Coaxial Cable and RF ConnectorHuawei MG323 GSM M2M Module Hardware Guide Antenna Interface Uplink frequency range GSM 824 849 MHz RF Specifications of the Antenna InterfaceSpecification Minimum Typical Maximum Unit Value ESD Protection for the Antenna InterfaceSpecification Minimum Typical Maximum Unit Value Polarization Linear polarization Pattern Omnidirectional Specifications of the Antenna InterfaceExtreme Working Conditions Electrical and Reliability FeaturesSymbol Specification Minimum Value Maximum Value Unit External power voltageElectrical Criteria of Application Interfaces Operating and Storage Temperatures and HumiditySpecification Minimum Value Maximum Value Unit Pin No Signal NameThan 3.3 Function Signal Name Waveform Remarks LevelPower supply Voltage great drop. The Vbat power voltageLedstatu Pins 41, 43, 45, 47, and 49 are power GND ExternalPower pin VBAT=0UART1RIN UART1 UART1RDUART1DSR UART1RTS UART1DTR UART1CTS UART1DCD Parameter Minimum Value Typical Value Maximum Value Unit Power Supply FeaturesInput Power Supply Working CurrentConfiguration Working Mode Typical value Unit RemarkBand Typical Unit Test Condition Standard Reliability FeaturesConfiguration Value Up/1 Down 123Test Condition Standard ESD Test Standard Contact Discharge Air Discharge ESD FeaturesEN61000-4-2 ±4 kV ±8 kV Dimensions Mechanical SpecificationsDimensions L x W x H 35 mm x 32.5 mm x 3.05 mm 1Dimensions of the MG323 module unit mm Dimensions of the B2B ConnectorModel Stacking HRS Number Height mm 5Structure fixing hole MG323 Module Installation Description6MG323 module installation 7Machine screw dimensions Specification Selection for Fasteners8Nut dimensions 1Circuits of typical interfaces in the MG323 module Appendix a Circuits of Typical InterfacesAcronym or Abbreviation Expansion Appendix B Acronyms and AbbreviationsRTC PbcchPCB PDU
Related manuals
Manual 239 pages 48.54 Kb
Top Page Image Contents