Huawei MG323 manual Power Interface, Overview, Vio, Vbat

	HUAWEI MG323 GSM M2M Module
	Hardware Guide				Description of the Application Interfaces
Pin	Pin Name		I/O	Description		DC Characteristics (V)
No.
	Normal	MUX				Min.	Tpy.	Max
39	NC	-	-	Not connected, please		-	-	-
				keep this pin open
40	VIO	-	P	External power output		2.70	2.80	2.95
41	GND	-	-	Ground		-	-	-
42	VBAT	-	P	Power supply input		3.30	3.80	4.80
43	GND	-	-	Ground		-	-	-
44	VBAT	-	P	Power supply input		3.30	3.80	4.80
45	GND	-	-	Ground		-	-	-
46	VBAT	-	P	Power supply input		3.30	3.80	4.80
47	GND	-	-	Ground		-	-	-
48	VBAT	-	P	Power supply input		3.30	3.80	4.80
49	GND	-	-	Ground		-	-	-
50	VBAT	-	P	Power supply input		3.30	3.80	4.80

P indicates power pins; I indicates pins for digital signal input; O indicates pins for digital signal output; AI indicates pins for analog signal input; AO indicates pins for analog signal input.

The NC (Not Connected) pins are internally connected to the module. Therefore, these pins should not be used, otherwise they may cause problems. Please contact us for more details about this information.

3.3Power Interface

3.3.1Overview

The power supply part of the B2B interface of the MG323 module contains:

VBAT interface for the power supply

VCOIN interface for the standby power supply of the real-time clock (RTC)

VIO interface for external power output

Table 3-2lists the definitions of the pins on the power supply interface.

Issue 06 (2013-06-13)	Huawei Proprietary and Confidential	16
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