Huawei ME909u-521 - Page 18

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.
18
Pin
No.
Pin Name
Pad
Type
Description
Parameter
Min.
(V)
Typ.
(V)
Max.
(V)
Comments
40
NC
-
Not connected,
please keep this
pin open
-
-
-
-
-
41
NC
-
Not connected,
please keep this
pin open
-
-
-
-
-
42
JTAG_TCK
I
JTAG clock input
V
IH
1.17
1.8
2.1
-
V
IL
–0.3
-
0.63
-
43
Reserved
-
Reserved, must
keep this pin open
-
-
-
-
-
44
Reserved
-
Reserved, must
keep this pin open
-
-
-
-
-
45
Reserved
-
Reserved, must
keep this pin open
-
-
-
-
-
46
Reserved
-
Reserved, must
keep this pin open
-
-
-
-
-
47
JTAG_SRST_
N
I
JTAG reset for
debugging
V
IH
1.17
1.8
2.1
-
V
IL
–0.3
-
0.63
-
48
GND
-
Ground
-
-
-
-
-
49
GND
-
Ground
-
-
-
-
-
50
GND
-
Ground
-
-
-
-
-
51
GPIO
I/O
General Purpose
I/O pins. The
function of these
pins has not been
defined.
V
OH
1.35
1.8
1.8
-
V
OL
0
-
0.45
-
V
IH
1.17
1.8
2.1
-
V
IL
–0.3
-
0.63
-
52
GND
-
Ground
-
-
-
-
-
53
GND
-
Ground
-
-
-
-
-
54
GND
-
Ground
-
-
-
-
-
55
GPIO
I/O
General Purpose
I/O pins. The
function of these
pins has not been
defined.
V
OH
1.35
1.8
1.8
-
V
OL
0
-
0.45
-
V
IH
1.17
1.8
2.1
-
V
IL
–0.3
-
0.63
-
56
GND
-
Ground
-
-
-
-
-