Huawei ME909u-521 - Page 21

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.
21
Pin
No.
Pin Name
Pad
Type
Description
Parameter
Min.
(V)
Typ.
(V)
Max.
(V)
Comments
90
USIM_CLK
O
USIM clock
-
-
1.8/2.8
5
-
-
91
Reserved
-
Reserved, must
keep this pin open
-
-
-
-
-
92
Reserved
-
Reserved, must
keep this pin open
-
-
-
-
-
93
JTAG_RTCK
O
JTAG return clock
V
OH
1.35
1.8
1.8
-
V
OL
0
-
-
-
94
NC
-
Not connected,
please keep this
pin open
-
-
-
-
-
95
NC
-
Not connected,
please keep this
pin open
-
-
-
-
-
96
NC
-
Not connected,
please keep this
pin open
-
-
-
-
-
97
NC
-
Not connected,
please keep this
pin open
-
-
-
-
-
98
NC
-
Not connected,
please keep this
pin open
-
-
-
-
-
99
NC
-
Not connected,
please keep this
pin open
-
-
-
-
-
100
RESIN_N
I
Reset module, this
pin is pulled up on
module
V
IH
1.17
1.8
2.1
-
V
IL
–0.3
-
0.63
-
101
LED_MODE
O
Mode indicator
Current sink
Drive strength: 10
mA
The firmware with
this feature is
under
development.
-
-
-
-
-
102
Reserved
-
Reserved, must
keep this pin open
-
-
-
-
-