User Manual

5
The following section illustrate signal pin-outs for the system connector.
2.3 Pin Assignment
Pin# Pin Name Description Pin# Pin Name Description
1 WAKE_L(NA)
Output and open Drain
active Low signal. This
signal is used to request
that the system return
from a sleep/suspended
state to service a
function initiated wake
event.
2 +3.3V +3.3V
3 No Connection - 4
GND GND
5
No Connection -
6
No Connection -
7
CLKREQ_L Output for reference
clock request signal
8
No Connection -
9
GND GND
10
No Connection -
11
REFCLK- Input signal for PCI
Express differential
reference clock (100
MHz)
12
No Connection -
13
REFCLK+ Input signal for PCI
Express differential
reference clock (100
MHz)
14
No Connection -
15 GND GND 16 No Connection -
17
No Connection -
18 GND GND
19
No Connection -
20
W_DISABLE_L Input and active low
signal. This signal is
used by the system to
disable radio operation
on add-in cards that
implement radio
frequency applications.
When implemented, this
signal requires a pull-up
resistor on the card
21 GND GND 22 PERST_L Input signal for