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HUAWEI EM820W HSPA+ PC Embedded Module
Hardware Guide
Definition of the EM820W Mini PCI Express pins
Pin
No.
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
Issue 01 (2010-12-09)
Mini PCI
HUAWEI Pin
Express
Description
Standard
Description
PERp0
NC
GND
GND
GND
GND
1.5 V
NC
GND
GND
SMB_CLK
NC
PETn0
NC
SMB_DATA
NC
PETp0
NC
GND
GND
GND
GND
USB_D-
USB_D-
GND
GND
USB_D+
USB_D+
3.3Vaux
VCC_3V3
GND
GND
3.3Vaux
VCC_3V3
LED_WWAN#
LED_WWAN
GND
GND
LED_WLAN#
NC
Reserved
NC
LED_WPAN#
NC
Reserved
NC
1.5 V
NC
Reserved
NC
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
Additional
Description
Not connected.
Mini Card ground.
Mini Card ground.
Not connected.
Mini Card ground.
Not connected.
Not connected.
Not connected.
Not connected.
Mini Card ground.
Mini Card ground.
USB signal D-.
Mini Card ground.
USB signal D+.
3.3V DC supply rail
from the PC side.
Mini Card ground.
3.3V DC supply rail
from the PC side.
Active-low LED signal
indicating the state of
the card.
Mini Card ground.
Not connected.
Not connected.
Not connected.
Not connected.
Not connected.
Not connected.
Direction to
Module
-
-
-
-
-
-
-
-
-
-
-
Input/output
-
Input/output
Input
-
Input
Output
-
-
-
-
-
-
-
7
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