Power-On Time Sequence | Huawei MG323 guide

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)
VBAT
	High-Z			1s
TERM_ON				1s
TERM_ON
		Sampling period used to
	6.6 ms	select Vgpio/Vmem
VIO	6.6 ms	2.8 V
VIO	6.3 ms	2.3 V
		Vio is set
Fetch Ext		130 ms	HW Power-Key		Nominal
Code		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.

Image 19

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

Contents

Hardware Guide Issue Date No Warranty Creation About This DocumentHistory Version Date Chapter Descriptions Version Date Chapter Descriptions Updated -3 Recommended Updated .8 Audio InterfaceSpecifications of the antenna interface Contents Electrical and Reliability Features Overview Introduction Function Overview Feature DescriptionOverall Description About This Chapter Gprs Gprs Class DRX=2DRX=5 DRX=9 SMS Circuit Block Diagram Application Block Diagram 2Circuit block diagram of the MG323 module Description of the Application Interfaces B2B Connector Interface Min Tpy Max Pin Pin Name Description DC Characteristics Normal Ledstatus ResetTermon UART1DCD Vbat Power InterfaceOverview VIO DCE Pin No Signal Name DescriptionVbat Interface GND Vcoin Vcoin 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 Pins Application Device Output Signal Control PinWorking or Network Status Uart Interface Pin No Signal Name Description Feature Direction DCE 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 ready Reset signal of the SIM card Clock signal of the SIM cardPower supply of the SIM card Data signal of the SIM card Circuit Recommended for the SIM Card Interface Ground signal of the SIM card Audio Interface 12External circuit for 32 Ω handsets/16 Ω headsets 13External circuit for the microphone interface Antenna Interface Antenna Installation Environmental Type Material Condition Coaxial Cable and RF Connector Huawei 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 Interface Specification Minimum Typical Maximum Unit Value Polarization Linear polarization Pattern Omnidirectional Specifications of the Antenna Interface Extreme Working Conditions Electrical and Reliability FeaturesSymbol Specification Minimum Value Maximum Value Unit External power voltage Electrical Criteria of Application Interfaces Operating and Storage Temperatures and HumiditySpecification Minimum Value Maximum Value Unit Pin No Signal Name Than 3.3 Function Signal Name Waveform Remarks LevelPower supply Voltage great drop. The Vbat power voltage Ledstatu Pins 41, 43, 45, 47, and 49 are power GND ExternalPower pin VBAT=0 UART1RIN UART1 UART1RDUART1DSR UART1RTS UART1DTR UART1CTS UART1DCD Parameter Minimum Value Typical Value Maximum Value Unit Power Supply FeaturesInput Power Supply Working Current Configuration Working Mode Typical value Unit RemarkBand Typical Unit Test Condition Standard Reliability FeaturesConfiguration Value Up/1 Down 123 Test 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 Connector Model Stacking HRS Number Height mm 5Structure fixing hole MG323 Module Installation Description 6MG323 module installation 7Machine screw dimensions Specification Selection for Fasteners 8Nut dimensions 1Circuits of typical interfaces in the MG323 module Appendix a Circuits of Typical Interfaces Acronym or Abbreviation Expansion Appendix B Acronyms and Abbreviations RTC PbcchPCB PDU