ADLINK Technology COM Express cExpress-BT2, User Manual

Page: 25 / 88

cExpress-BT2
Pinouts and Signal Descriptions
19
3.3.10. USB Root Segmentation
Row A/B
HSI/ 0
HSI/ 1
XH/I /ontroller
EH/I /ontroller
P1 P2 P3 P4
P1-P4
SSP1 P5
P6
U
SB
0-
/A
45
U
SB
0+
/A
46
U
SB
1-
/B
45
U
SB
1+
/B
46
U
SB
2-
/A
42
U
SB
2+
/A
43
U
SB
3-
/B
42
U
SB
3+
/B
43
U
SB
4-
/A
39
U
SB
4+
/A
40
U
SB
5-
/B
39
U
SB
5+
/B
40
U
SB
6-
/A
36
U
SB
6+
/A
37
U
SB
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