Uart Interface; Overview - Huawei MU509 Series Hardware Manual
Hsdpa lga module
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Also See for MU509 Series:
- At command interface specification (227 pages) ,
- Hardware migration manual (70 pages) ,
- Development kit manual (35 pages)
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HUAWEI MU509 Series HSDPA LGA Module
Hardware Guide
3.5 UART Interface
3.5.1 Overview
The MU509 module provides the UART (8-wire UART) interface for one
asynchronous communication channel. As the UART interface supports signal control
through standard modem handshake, AT commands are entered and serial
communication is performed through the UART interface. The UART has the following
features:
Table 3-9 lists the UART interface signals.
Table 3-9 UART interface signals
Pin
No.
76
78
77
74
79
80
75
73
Issue 09 (2014-03-06)
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)
Pin Name
I/O
UART_TX
O
UART_RX
I
UART_RING
O
UART_RTS
O
UART_DTR
I
UART_CTS
I
UART_DCD
O
UART_DSR
O
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
Description
Data sending on the
wireless module
Data receive end of the
module
Ringing indication on
the wireless module
Data sending request
on the wireless module
Data terminal ready on
the wireless module
Clearing to send on
the wireless module
Data carrier detection
on the wireless module
Data ready on the
wireless module
DC Characteristics (V)
Min.
Typ.
Max.
–0.3
2.6
2.9
–0.3
2.6
2.9
–0.3
2.6
2.9
–0.3
2.6
2.9
–0.3
2.6
2.9
–0.3
2.6
2.9
–0.3
2.6
2.9
–0.3
2.6
2.9
39
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