18
Pinouts and Signal Descriptions
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
All USB from XHCI controller.
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
PU 10K
3.3VSB
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
3.3VSB
Carrier shall pull
to GND or leave
no- connect.
BIOS_DIS1# B88 Selection strap to determine the BIOS boot
device.
I
PU 10K
3.3VSB
Carrier shall pull
to GND or leave
no- connect
Содержание cExpress-KL
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