Huawei MG323 manual Circuit Recommended for the UART Interface, Pin No, Signal Name, Description

HUAWEI MG323 GSM M2M Module
Hardware Guide				Description of the Application Interfaces
	Pin No.	Signal Name	Description	Feature	Direction
	33	UART1_TD	DCE receive	The DTE transmits	DTE to DCE
			data	serial data.
	38	UART1_RING	DCE ring	The DCE notifies	DCE to DTE
			indicator	the DTE of a
				remote call.
	32	UART1_DTR	DCE data	The DTE is ready.	DTE to DCE
			terminal ready
	34	UART1_RTS	DCE request to	The DTE requests	DTE to DCE
			send	the DCE to send
				data.
	36	UART1_DSR	DCE data set	The DCE is ready.	DCE to DTE
			ready
	28	UART1_CTS	DCE clear to	The DCE has	DCE to DTE
			send	switched to the
				data receiving
				mode.
	24	UART1_DCD	DCE data	A data link is set	DCE to DTE
			carrier detect	up.

3.6.2Circuit Recommended for the UART Interface

Figure 3-8shows the connection of the UART1 interface in the MG323 module (DCE) with the host (DTE).

Figure 3-8Connection of the UART1 interface in the MG323 module (DCE) with the host (DTE)

When an MG323 module receives an SM (Short Message), a low-level signal is output through the RING (pin 38) for 1s, as shown in Figure 3-9 .

Issue 06 (2013-06-13)	Huawei Proprietary and Confidential	24
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