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HUAWEI EM820W HSPA+ PC Embedded Module
Hardware Guide
Definition of the EM820W Mini PCI Express pins
Pin
No.
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Issue 01 (2010-12-09)
Mini PCI
HUAWEI Pin
Express
Description
Standard
Description
3.3Vaux
VCC_3V3
COEX1
NC
GND
GND
COEX2
NC
1.5 V
NC
CLKREQ#
NC
UIM_PWR
UIM_PWR
GND
GND
UIM_DATA
UIM_DATA
REFCLK-
NC
UIM_CLK
UIM_CLK
REFCLK+
NC
UIM_RESET
UIM_RESET
GND
GND
UIM_Vpp
NC
Reserved
NC
GND
GND
Reserved
NC
W_DISABLE#
W_DISABLE_N
GND
GND
PERST#
NC
PERn0
NC
3.3Vaux
VCC_3V3
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
Additional
Description
3.3 V DC supply rails
from the PC side.
Not connected.
Mini Card ground.
Not connected.
Not connected.
Not connected.
Power source for the
external UIM/SIM
card.
Mini Card ground.
External UIM/SIM
data signal.
Not connected.
External UIM/SIM
clock signal.
Not connected.
External UIM/SIM
reset signal.
Mini Card ground.
Not connected.
Not connected.
Mini Card ground.
Not connected.
For ending the
wireless
communications.
Mini Card ground.
Not connected.
Not connected.
3.3V DC supply rail
from the PC side.
Direction to
Module
Input
-
-
-
-
-
Output
-
Input/output
-
Output
-
Output
-
-
-
-
-
Input
-
-
-
Input
6
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