Huawei ME909u-521 - Page 20

HUAWEI ME909u-521 LTE LGA Module
Hardware Guide
Description of the Application Interfaces
Issue 05 (2017-12-15)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
20
Pin
No.
Pin Name
Pad
Type
Description
Parameter
Min.
(V)
Typ.
(V)
Max.
(V)
Comments
76
UART0_TX
O
UART0 transmit
output
V
OH
1.35
1.8
1.8
-
V
OL
0
-
0.45
-
77
Reserved
-
Reserved, must
keep this pin open
-
-
-
-
-
78
UART0_RX
I
UART0 receive
data input
V
IH
1.17
1.8
2.1
-
V
IL
–0.3
-
0.63
79
Reserved
-
Reserved, must
keep this pin open
-
-
-
-
-
80
UART0_CTS
I
UART0 Clear to
Send
V
IH
1.17
1.8
2.1
-
V
IL
–0.3
-
0.63
-
81
POWER_ON_
OFF
I
System power-on
or power-off, pulled
up in module. Do
not pull up it any
more on the
customer board.
-
-
1.8
-
-
82
NC
-
Not connected,
please keep this
pin open
-
-
-
-
-
83
NC
-
Not connected,
please keep this
pin open
-
-
-
-
-
84
NC
-
Not connected,
please keep this
pin open
-
-
-
-
-
85
USB_DM
I/O
USB Data- defined
in the USB 2.0
Specification
-
-
-
-
-
86
USB_DP
I/O
USB Data+ defined
in the USB 2.0
Specification
-
-
-
-
-
87
JTAG_TDI
I
JTAG test data
input
V
IH
1.17
1.8
2.1
-
V
IL
–0.3
-
0.63
-
88
USIM_RESET
O
USIM reset
-
-
1.8/2.8
5
-
-
89
USIM_DATA
I/O
USIM data
-
-
1.8/2.8
5
-
-