nanoX-EL User’s Guide
PICMG COM.0 R3.0
Page 38
Copyright © 2021 ADLINK Technology, Inc.
4.3.10
SPI Bus (BIOS only)
Name
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
