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.
27
3.4 Signal Control Interface
3.4.1 Overview
The signal control part of the interface in the ME909u-521 module consists of the
following:
Power-on/off (POWER_ON_OFF) pin
System reset (RESIN_N) pin
WAKEUP_IN Signal (WAKEUP_IN) pin
WAKEUP_OUT Signal (WAKEUP_OUT) pin
SLEEP_STATUS Signal (SLEEP_STATUS) pin
LED control signal (LED_MODE) pin
Table 3-3 lists the pins on the signal control interface.
Table 3-3
Definitions of the pins on the signal control interface
Pin
No.
Pin Name
Pad
Type
Description
Parameter
Min.
(V)
Typ.
(V)
Max.
(V)
Comments
11
WAKEUP_IN
I
Host to set the module
into sleep or wake up
the module from sleep.
V
IH
1.17
1.8
2.1
-
V
IL
–0.3
-
0.63
-
15
SLEEP_STA
TUS
O
Indicates sleep status
of ME909u-521 module
V
OH
1.35
1.8
1.8
-
V
OL
0
-
0.45
-
71
WAKEUP_O
UT
O
Module to wake up the
host
V
OH
1.35
1.8
1.8
-
V
OL
0
-
0.45
-
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
-
-
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
.
-
-
-
-
-
