16
Pinouts and Signal Descriptions
Signal
Pin
Description
I/O
PU/PD
Comment
USB1+
USB1-
B46
B45
USB differential data pairs for Port 1
I/O
3.3VSB
USB 1.1/ 2.0 compliant
USB2+
USB2-
A43
A42
USB differential data pairs for Port 1
I/O
3.3VSB
USB 1.1/ 2.0 compliant
USB3+
USB3-
B43
B42
USB differential data pairs for Port 2
I/O
3.3VSB
USB 1.1/ 2.0 compliant
USB_0_1_OC# B44 USB over-current sense, USB ports 0
and 1. 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_2_3_OC# A44 USB over-current sense, USB ports 2
and 3. 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
USB0_HOST_
PRSNT
A48
Module USB client may detect the
presence of a USB host on USB0. A
high value indicates that a host is
present.
I 3.3VSB
Not Supported. Limitation of this
platform
3.3.7.
USB Root Segmentation
All USB from XHCI controller
3.3.8.
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 not-
connected.
BIOS_DIS1# B88 Selection strap to determine the BIOS boot
device.
I
PU 10k
3.3VSB
Carrier shall pull to
GND or leave not-
connected
