User's Manual

8
WLAN_LED
44
provide status
indicators via LED
devices
O
Active low signals
USB_DN
36
USB signal
I/O
NOT
USED
USB_DP
38
USB signal
I/O
NOT
USED
3.3V
2,24,41,52
power source
GND
4,9,15,18,21,26,27,29
34,35,40,43,50
GND
1.4 PCIe Signal Description
The WM862FEMD PCI Express interface pins are described in “Pin Definition” at Table1-1.
The interface pins grouped by functional type shows as below.
Table 1-2 Type of PCI Express Interface Signals
Type
Pins
Differential reference clock
(100MHz)
REFCLK-
REFCLK+
Differential receive
PETp0
PETn0
Differential transmit
PERn0
PERp0
Reference clock request
CLKREQ_L
Request to service a function
initiated wake event
WAKE_L
PCI Express fundamental reset
RESET_L