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.
15
Figure 3-2
Appearance of ME909u-521 module (without label)
Table 3-1 shows the definitions of pins on the 145-pin signal interface of the
ME909u-521 module.
Table 3-1
Definitions of pins on the LGA interface
Pin
No.
Pin Name
Pad
Type
Description
Parameter Min.
(V)
Typ.
(V)
Max.
(V)
Comments
1
UART1_TX
O
UART1 transmit
output
V
OH
1.35
1.8
1.8
-
V
OL
0
-
0.45
-
2
UART1_RTS
O
UART1 Ready for
receive
V
OH
1.35
1.8
1.8
-
V
OL
0
-
0.45
-
3
UART1_CTS
I
UART1 Clear to
Send
V
IH
1.17
1.8
2.1
-
V
IL
–0.3
-
0.63
-
4
UART1_RX
I
UART1 receive
data input
V
IH
1.17
1.8
2.1
-
V
IL
–0.3
-
0.63
-
5
PCM_SYNC
O
PCM interface sync
V
OH
1.35
1.8
1.8
-
V
OL
0
-
0.45
-
6
PCM_DIN
I
PCM interface data
in
V
IH
1.17
1.8
2.1
-
V
IL
–0.3
-
0.63
-
7
PCM_DOUT
O
PCM interface data
out
V
OH
1.35
1.8
1.8
-
V
OL
0
-
0.45
-
8
PCM_CLK
O
PCM interface
clock
V
OH
1.35
1.8
1.8
-
V
OL
0
-
0.45
-
