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HUAWEI EM820W HSPA+ PC Embedded Module
Hardware Guide Description of the Application Interfaces
Issue 01 (2010-12-31)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
6
Definition of the EM820W Mini PCI Express pins
Pin
No.
Mini PCI
Express
Standard
Description
HUAWEI Pin
Description
Additional
Description
Direction to
Module
2
3.3Vaux VCC_3V3 3.3 V DC supply rails
from the PC side.
Input
3 COEX1 NC Not connected. -
4 GND GND Mini Card ground. -
5 COEX2 NC Not connected. -
6 1.5 V NC Not connected. -
7 CLKREQ# NC Not connected. -
8
UIM_PWR UIM_PWR Power source for the
external UIM/SIM
card.
Output
9 GND GND Mini Card ground. -
10
UIM_DATA UIM_DATA External UIM/SIM
data signal.
Input/output
11 REFCLK- NC Not connected. -
12
UIM_CLK UIM_CLK External UIM/SIM
clock signal.
Output
13 REFCLK+ NC Not connected. -
14
UIM_RESET UIM_RESET External UIM/SIM
reset signal.
Output
15 GND GND Mini Card ground. -
16 UIM_Vpp NC Not connected. -
17 Reserved NC Not connected. -
18 GND GND Mini Card ground. -
19 Reserved NC Not connected. -
20
W_DISABLE# W_DISABLE_N For ending the
wireless
communications.
Input
21 GND GND Mini Card ground. -
22
PERST# NC
Not connected. -
23
PERn0 NC
Not connected. -
24
3.3Vaux
VCC_3V3
3.3V DC supply rail
from the PC side.
Input