ADLINK cExpress-BT2 - Manual (Page 22)

Page 22 cExpress-BT2
Signal Pin # Description I/O PU/PD Comment
USB_4_5_OC# B38 USB over-current sense, USB ports 4 and 5. A pull-up
for this line shall be present on the module. An open
drain driver from a USB current monitor on the carrier
board may drive this line low. I 3.3VSB PU 10k 3.3VSB Do not pull high on carrier
USB_6_7_OC# A38 USB over-current sense, USB ports 6 and 7. A pull-up
for this line shall be present on the module. An open
drain driver from a USB current monitor on the carrier
board may drive this line low. I 3.3VSB PU 10k 3.3VSB Do not pull high on carrier
3.3.10. USB Root Segmentation
Row A/B
HSIC 0 HSIC 1
XHCI Controller EHCI Controller
P1 P2 P3 P4 P1-P4 SSP1 P5 P6
US
B
0
-
/
A
45
U
SB
0
+/A
46
US
B
1
-
/
B
45
U
SB
1
+/B
46
US
B
2
-
/
A
42
US
B
2
+
/
A
43
US
B3
-
/
B
42
US
B
3
+
/
B
43
US
B
4
-
/
A
39
US
B
4
+
/
A
40
US
B5
-
/
B
39
US
B
5
+
/
B
40
US
B
6
-
/
A
36
US
B
6
+
/
A
37
US
B
7
-
/
B
36
U
SB
7
+/B
37
USB Hub
Port 0
(1.1/2.0)
Port 1
(1.1/2.0)
Port 2
(1.1/2.0)
Port 3
(1.1/2.0)
Port 4
(1.1/2.0)
Port 5
(1.1/2.0)
Port 6
(1.1/2.0)
3.3.11. SPI (BIOS only)
Signal Pin # Description I/O PU/PD Comment
SPI_CS# B97 Chip select for Carrier Board SPI BIOS Flash. O 3.3VSB Only support CS0
SPI_MISO A92 Data in to module from carrier board SPI BIOS flash. I 3.3VSB
SPI_MOSI A95 Data out from module to carrier board SPI BIOS flash. O 3.3VSB
SPI_CLK A94 Clock from module to carrier board SPI BIOS flash. O 3.3VSB
SPI_POWER A91 Power supply for Carrier Board SPI – sourced from Module
– nominally 3.3V.
The Module shall provide a minimum of 100mA on
SPI_POWER.
Carriers shall use less than 100mA of SPI_POWER.
SPI_POWER shall only be used to power SPI devices on
the Carrier O P 3.3VSB
BIOS_DIS0# A34 Selection strap to determine the BIOS boot device. I PU 10K 3.3V
Carrier shall pull to GND
or leave not- connected.
BIOS_DIS1# B88 Selection strap to determine the BIOS boot device. I PU 10K 3.3V Carrier shall pull to GND
or leave not- connected