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COMe-bEP7 Module User Guide
www.kontron.com
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9/
Features and Interfaces
9.1.
SPI boot
The COMe-bEP7 supports boot from an external SPI Flash. It can be configured by
pin A34 (BIOS_DIS0#) and pin B88 (BIOS_DIS1#) in following configuration:
Table 19: SPI Boot Pin Configuration
Configuration
BIOS_DIS0#
BIOS_DIS1#
Function
1
open
open
Boot on module BIOS
2
GND
open
Not supported
3
open
GND
Boot on carrier SPI
4
GND
GND
Boot on module SPI
By default, only the primary SPI Boot Device (chip select 0) is used in
configuration 3 & 4. To access the secondary SPI device (chip select 1), the
BIOS must be customized.
Table 20: Supported SPI boot flash types for 8-SOIC package
Size
Manufacturer
Part Number
Device ID
128 Mbit
Micron
MT25QU128ABA1E
0x20BA18
128 Mbit
Winbond
W25Q128JVSIG
0xEF7018
9.2.
Updating SPI flash using AFU tool
To update the BIOS, you first need to boot in the EFI Shell or Linux OS with an USB
key containing the AFU tool (for EFI Shell or Linux) and the binary to flash the SPI
with, plugged on the system.
Note: with AFU, there is currently no support to boot from a SPI and program the
“other” SPI by changing BIOS_DIS0#/BIOS_DIS1#. So, it cannot be used to program a
blank part.
To update a SPI chip:
1.
Connect a SPI flash with the correct size (similar to BIOS ROM file size) to the
module SPI interface.
2.
Turn on the system and boot in the EFI shell or Linux.
Содержание COMe-bEP7
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