Usb root segmentation, Spi (bios only), Page 22 cexpress-bt – ADLINK cExpress-BT User Manual
Page 22
Page 22
cExpress-BT
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
EHC I Controller
P1
P2
P3
P4
P1-P4
SSP1
P5
P6
US
B
0
-/
A
4
5
US
B
0+
/
A
46
U
SB1
-/
B4
5
US
B1
+
/
B4
6
US
B
2-
/
A
4
2
US
B
2
+
/
A
43
U
SB3
-/
B4
2
US
B
3+
/
B4
3
US
B
4-
/
A
3
9
US
B
4
+
/
A
40
U
SB5
-/
B3
9
US
B
5+
/
B4
0
US
B6
-
/
A
3
6
US
B
6+
/
A
37
US
B7
-
/
B
3
6
US
B
7
+
/
B
37
US
B
3_
RN
0
/ C3
US
B
3_
RP
0
/
C4
US
B
3_
TN
0
/
D
3
US
B3
_T
P
0
/
D
4
US
B
3_
RN
1
/ C
3
US
B3
_
RP
1
/
C4
US
B3
_T
N
1
/
D
3
US
B3
_
TP
1
/
D
4
US
B
3_
R
N
2
/ C
3
US
B3
_
R
P2
/
C4
US
B3
_
TN
2
/
D
3
US
B3
_T
P2
/
D
4
US
B
3_
R
N
3
/ C
3
US
B3
_
R
P3
/
C4
US
B
3_
TN
3
/
D
3
US
B
3
_T
P3
/
D
4
Row C/D
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)
Port 0
(3.0)
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 supports 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