HUAWEI EM820W HSPA+ PC Embedded Module
Hardware Guide
Description of the Application Interfaces
Issue 01 (2010-12-09)
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.
-
