Uart Interface; Overview - Huawei MU609 Hardware Manual

HUAWEI MU609 HSPA LGA Module
Hardware Guide
Figure 3-11 Driving circuit

3.5 UART Interface

3.5.1 Overview

The MU609 module provides the UART0 (8-wire UART) interface for one
asynchronous communication channel. As the UART0 interface supports signal
control through standard modem handshake, AT commands are entered and serial
communication is performed through the UART0 interface. The UART1 (2-wire UART)
interface is provided by MU609 module. AT commands are entered through the
UART1 interface for debugging. The UART has the following features:
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Table 3-8 lists the UART interface signals.
Table 3-8 UART interface signals
PIN
Pin Name
No.
1 UART1_TX
4 UART1_RX
Issue 04 (2016-12-12)
Full-duplex
7-bit or 8-bit data
1-bit or 2-bit stop bit
Odd parity check, even parity check, or non-check
Baud rate clock generated by the system clock
Direct memory access (DMA) transmission
Baud rate ranging from 600 bit/s to 230400 bit/s (115200 bit/s by default)
Baud rate adaptive changes are not supported.
Pad
Description
Type
O UART1 transmit
output only for
debugging.
I UART1 receive
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Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
Parameter Min. (V)
V 1.35
OH
V 0
OL
V 1.2
IH
Typ.
Max. (V)
(V)
- 1.8
- 0.45
1.8 2.1
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