Table 9.
ExpressCard Connector Signals
Pin
Signal Name
Signal Description
1
GND
Ground
2
USBD–
USB Data –
3
USBD+
USB Data +
4
CPUSB#
USB Presence
5
RESERVED
Reserved by spec for future use
6
RESERVED
Reserved by spec for future use
7
SMBCLK
SMBus Clock
8
SMBDATA
SMBus Data
9
+1.5V
Power
10
+1.5V
Power
11
WAKE#
PE Wake
12
+3.3VAUX
Power
13
PERST#
PE Reset
14
+3.3V
Power
15
+3.3V
Power
16
CLKREQ#
Clock Request
17
CPPE#
PE Presence
18
REFCLK–
Reference Clock –
19
Reference Clock +
20
GND
Ground
21
PERn0
PE Data Receive -
22
PERp0
PE Data R
23
GND
Ground
24
PETn0
PE Data Transmit -
25
PETp0
PE Data Tr
36
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NI PXIe-8840 Quad-Core User Manual