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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.
7
Definition of the EM820W Mini PCI Express pins
Pin
No.
Mini PCI
Express
Standard
Description
HUAWEI Pin
Description
Additional
Description
Direction to
Module
25
PERp0 NC
Not connected. -
26
GND GND
Mini Card ground. -
27
GND GND
Mini Card ground. -
28
1.5 V NC
Not connected. -
29
GND GND
Mini Card ground. -
30
SMB_CLK NC
Not connected. -
31
PETn0 NC
Not connected. -
32
SMB_DATA NC
Not connected. -
33
PETp0 NC
Not connected. -
34
GND GND
Mini Card ground. -
35
GND GND
Mini Card ground. -
36
USB_D- USB_D-
USB signal D-. Input/output
37
GND GND
Mini Card ground. -
38
USB_D+ USB_D+
USB signal D+. Input/output
39
3.3Vaux VCC_3V3
3.3V DC supply rail
from the PC side.
Input
40
GND GND
Mini Card ground. -
41
3.3Vaux VCC_3V3
3.3V DC supply rail
from the PC side.
Input
42
LED_WWAN# LED_WWAN
Active-low LED signal
indicating the state of
the card.
Output
43
GND GND
Mini Card ground. -
44
LED_WLAN# NC
Not connected. -
45
Reserved NC
Not connected. -
46
LED_WPAN# NC
Not connected. -
47
Reserved NC
Not connected. -
48
1.5 V NC
Not connected. -
49
Reserved
NC
Not connected. -