VersaLogic VL-EBX-18, Hardware Reference Manual, Page: 34 / 63

Interfaces and Connectors
EBX-18 Hardware Reference manual
27
J19
Pin
PCIe Mini Card
Signal Name
PCIe Mini Card
Function
mSATA
Signal Name
mSATA
Function
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 EBX-18 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, but this pin already has a
pull-down enabled in the EBX-18 FPGA to keep the SATA channel mux from switching when J19 is empty.
2. This pin is not grounded on the EBX-18 to make it available for mSATA module detection.
3. This signal drives the blue LED activity indicator at location D10 in the lower right corner of the board (refer to
Figure 12). 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 EBX-18, this signal is
used as the default indicator for mSATA versus PCIe Mini Card detection.
M
SATA A
CTIVITY
LED
Figure 12 shows the location (D10) of the mSATA activity blue LED. This LED indicates
activity on the mSATA interface. Not all mSATA drives provide this disk activity signal. Note
that the FPGA register bit for the DEBUG_LED needs to be cleared (set to 0) in order for this
signal to reflect the MSATA_DAS signal from the mSATA interface. Until that is done, it
reflects the status of the FPGA programming (set to 1 when the FPGA is programmed and reset
properly). Refer to the
EBX-18 Programmer’s Reference Manual (available on the EBX-18
Product Support Web Page ) for information on FPGA registers.