Huawei MG323 manual UART Interface, Overview, Direction, Pin No, Signal Name, Description, Feature

HUAWEI MG323 GSM M2M Module
Hardware Guide	Description of the Application Interfaces

Figure 3-7Driving circuit

3.6 UART Interface

3.6.1Overview

The MG323 module provides the UART1 (8-wire UART) interface for one asynchronous communication channel. As the UART1 interface supports signal control through standard modem handshake, AT commands are entered and serial communication is performed through the UART1 interface. The UART1 has the following features:

Full-duplex

Baud rate clock generated by the system clock

Direct memory access (DMA) transmission

Baud rate ranging from 9600 bit/s to 230400 bit/s (115200 bit/s by default)

Self-adapted baud rate ranging from 9600 bit/s to 115200 bit/s

Table 3-6lists the UART1 interface signals.

Table 3-6UART1 interface signals

Pin No.	Signal Name	Description	Feature	Direction
29	UART1_RD	DCE transmit	The data terminal	Data circuit-
		data	equipment (DTE)	terminating
			receives serial	equipment
			data.	(DCE) to DTE

Issue 06 (2013-06-13)	Huawei Proprietary and Confidential	23
	Copyright © Huawei Technologies Co., Ltd.