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HUAWEI MU509-65 HSDPA LGA Module
Hardware Guide
Figure 3-17 Connections of the WAKEUP_IN and WAKEUP_OUT pins
3.5 UART Interface
3.5.1 Overview
The MU509-65 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
Pin Name
No.
76
UART_TX
78
UART_RX
Issue 01 (2016-04-08)
VCC_EXT2
WAKEUP_IN
Module
(DCE)
WAKEUP_OUT
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)
Pad
Description
Type
UART transmit
O
output
UART receive data
I
input
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Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
2.2 kΩ
2.2 kΩ
c
b
1 nF
e
2.2 kΩ
c
b
e
Parameter
Min. (V)
V
2.15
OH
V
0
OL
V
1.69
IH
–0.3
V
IL
Micro Control
(DTE)
2.2 kΩ
VCC_EXT
1 nF
Typ. (V)
Max. (V)
-
2.6
-
0.45
-
2.9
-
0.91
34
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