Circuit Recommended For The Uart Interface - Huawei MU709 Series Hardware Manual
Hspa+ lga module
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Also See for MU709 Series:
- Hardware manual (63 pages) ,
- Design manual (18 pages) ,
- Development kit manual (35 pages)
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HUAWEI MU709 Series HSPA+ LGA Module
Hardware Guide
Pin
Pin Name
No.
76
UART0_TX
78
UART0_RX
77
UART0_RING
74
UART0_RTS
79
UART0_DTR
80
UART0_CTS
75
UART0_DCD
73
UART0_DSR
3.5.2 Circuit Recommended for the UART Interface
Figure 3-12 Connection of the UART interface in the MU709 module (DCE) with the host
(DTE)
Module
(DCE)
Issue 09 (2017-12-15)
Pad
Description
Type
debugging
O
UART0 transmit output
I
UART0 receive data input
O
UART0 ring indicator
O
UART0 ready for receive
I
UART0 data terminal ready
I
UART0 clear to send
O
UART0 data carrier detect
O
UART0 data set ready
UART0_TX
UART0_RX
UART0_RTS
UART0_CTS
UART0_DTR
UART0_DSR
UART0_DCD
UART0_RING
UART1_TX
UART1_RX
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
Parameter
V
IL
V
OH
V
OL
V
IH
V
IL
V
OH
V
OL
V
OH
V
OL
V
IH
V
IL
V
IH
V
IL
V
OH
V
OL
V
OH
V
OL
RXD
TXD
CTS
RTS
DTR
DSR
Application
DCD
Device
RING
(DTE)
test point
test point
Min.
Typ.
Max.
(V)
(V)
(V)
–0.3
-
0.63
1.35
1.8
2.1
0
-
0.45
1.26
1.8
2.1
–0.3
-
0.63
1.35
1.8
2.1
0
-
0.45
1.35
1.8
2.1
0
-
0.45
1.26
1.8
2.1
–0.3
-
0.63
1.26
1.8
2.1
–0.3
-
0.63
1.35
1.8
2.1
0
-
0.45
1.35
1.8
2.1
0
-
0.45
33
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