Power Interface; Overview; Power Supply Vbat Interface - Huawei ME909u-521 Hardware Manual

HUAWEI ME909u-521 LTE LGA Module
Hardware Guide

3.3 Power Interface

3.3.1 Overview

The power supply part of the ME909u-521 module contains:



Table 3-2 lists the definitions of the pins on the power supply interface.
Table 3-2 Definitions of the pins on the power supply interface
Pin No. Pin
Name
12 and 13 VBAT
48–50, 52–54, GND
56–59, 106,
108, 110 and
112
32 VCC_EXT1
34 USIM_VCC
121–145 GND

3.3.2 Power Supply VBAT Interface

When the ME909u-521 module works normally, power is supplied through the VBAT
pins and the voltage ranges from 3.3 V to 4.2 V (typical value: 3.8 V). The 145-pin
LGA provides 2 VBAT pins and 41 GND pins for external power input. To ensure that
the ME909u-521 module works normally, all the pins must be used efficiently.
Issue 05 (2017-12-15)
 P indicates power pins; I indicates pins for digital signal input; O indicates pins for digital
signal output; PO indicates power output pins; PI indicates power input pins.
 V indicates Low-level Input voltage; V
IL
Low-level Output voltage; V
 The NC pins are not connected, therefore, before you deal with these pins, please refer to
the corresponding hardware guide.
 The Reserved pins are internally connected to the module. Therefore, these pins should not
be used, otherwise they may cause problems. Please contact with us for more details about
this information.
VBAT pins for the power supply
VCC_EXT1 pin for external power output with 1.8 V
USIM_VCC pin for USIM card power output
Pad Description
Type
PI Pins for power
voltage input
-
Ground
PO Pin for external
power output
PO Power
for USIM card
-
Thermal
Ground Pad
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Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
indicates High-level Input voltage; V
IH
indicates High-level Output voltage.
OH
Parameter Min.
(V)
-
3.3
-
-
-
-
-
supply -
-
-
indicates
OL
Typ. Max. Comments
(V) (V)
-
3.8 4.2
-
- -
-
1.8 -
-
1.8/2. -
85
-
- -
25