
Multi-purpose I/O
EPM-31 Hardware Reference Manual
35
J14
Pin
PCIe Mini Card
Signal Name
PCIe Mini Card
Function
mSATA
Signal Name
mSATA
Function
12
NC
Not connected
Reserved
Not connected
13
Reference clock input +
Reserved
Not connected
14
NC
Not connected
Reserved
Not connected
15
GND
Ground
GND
Ground
16
NC
Not connected
Reserved
Not connected
17
NC
Not connected
Reserved
Not connected
18
GND
Ground
GND
Ground
19
NC
Not connected
Reserved
Not connected
20
W_DISABLE#
Wireless disable
Reserved
Not connected
21
GND
Ground
GND
Ground
22
PERST#
Card reset
Reserved
Not connected
23
PERn0
PCIe receive –
+B
Host receiver diff. pair +
24
3.3VAUX
3.3V auxiliary source
+3.3V
3.3V source
25
PERp0
PCIe r
-B
Host receiver diff. pair –
26
GND
Ground
GND
Ground
27
GND
Ground
GND
Ground
28
1.5V
1.5V power
+1.5V
1.5V power
29
GND
Ground
GND
Ground
30
SMB_CLK
SMBus clock
Two Wire I/F
Two wire I/F clock
31
PETn0
PCIe transmit –
-A
Host transmitter diff. pair –
32
SMB_DATA
SMBus data
Two Wire I/F
Two wire I/F data
33
PETp0
PCIe tr
+A
Host transmitter diff. pair +
34
GND
Ground
GND
Ground
35
GND
Ground
GND
Ground
36
USB_D-
USB data –
Reserved
Not connected
37
GND
Ground
GND
Ground
38
USB_D+
USB data +
Reserved
Not connected
39
3.3VAUX
3.3V auxiliary source
+3.3V
3.3V source
40
GND
Ground
GND
Ground
41
3.3VAUX
3.3V auxiliary source
+3.3V
3.3V source
42
LED_WWAN#
Wireless WAN LED
Reserved
Not connected
43
GND
mSATA detect (
Note 1
)
GND/NC
Ground/not connected (
Note 2
)
44
LED_WLAN#
Wireless LAN LED
Reserved
Not connected
45
NC
Not connected
Vendor
Not connected
46
LED_WPAN#
Wireless PAN LED
Reserved
Not connected
47
NC
Not connected
Vendor
Not connected
48
1.5V
1.5V power
+1.5V
1.5V power
49
Reserved
Reserved
DA/DSS
Device activity (
Note 3
)
50
GND
Ground
GND
Ground
51
Reserved
Reserved
GND
Ground (
Note 4)
52
3.3VAUX
3.3V auxiliary source
+3.3V
3.3V source
Notes:
1.
This pin is not grounded on the EPM
-
31 since it can be used to detect the presence of an mSATA module
versus a PCIe Mini Card. Grounding this pin is available as an option on custom boards.
2.
This pin is not grounded on the BayCat to make it available for mSATA module detection.
3.
This signal drives the blue LED activity indicator at the location shown in Figure 16. This LED lights with
mSATA disk activity, if supported by the mSATA module.
4.
Some PCIe modules use this signal as a second Mini Card wireless disable input. On the BayCat, this signal
is available for use for mSATA versus PCIe Mini Card detection. There is an option in BIOS setup for setting
the mSATA detection method.