Huawei MG323 manual Function Signal Name Waveform Remarks Level, Power supply, Than 3.3

HUAWEI MG323 GSM M2M Module
Hardware Guide				Electrical and Reliability Features
	Pin No.	Signal Name	Pin No.		Signal Name
	11	GND	12		INTMIC_P
	13	NC	14		EXTMIC_P
	15	NC	16		EXTMIC_N
	17	NC	18		GND
	19	NC	20		TERM_ON
	21	NC	22		RESET
	23	NC	24		UART1_DCD
	25	LED_STATUS	26		NC
	27	NC	28		UART1_CTS
	29	UART1_RD	30		NC
	31	NC	32		UART1_DTR
	33	UART1_TD	34		UART1_RTS
	35	VCOIN	36		UART1_DSR
	37	NC	38		UART1_RING
	39	NC	40		VIO
	41	GND	42		VBAT
	43	GND	44		VBAT
	45	GND	46		VBAT
	47	GND	48		VBAT
	49	GND	50		VBAT

Table 5-4lists electrical features (typical values) measured when no external device is connected to the MG323 module through the 50-pin B2B interface.

Table 5-4Electrical features of application interfaces

Function	Signal Name	I/O		Waveform and	Remarks
				Level
Power supply	VBAT	P		VI=3.30 V to 4.80	Pins 42, 44, 46, 48, and 50 are power supply
interface				V	pins used to supply the MG323 module with
				VItypical=3.80 V	power. When the module transmits signals at
					the maximum power, the transient current can
					reach about 2 A, which may result in VBAT
					voltage great drop. The VBAT power voltage
					for the MG323 module should not be lower
					than 3.3 V.
Issue 06 (2013-06-13)			Huawei Proprietary and Confidential			37
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