Secondary Bios; Fwh Secondary Bios - Com.0 Rev. 1.0 - ADLINK Technology Express-BASE User Manual

7 Secondary BIOS

The Express-BASE supports Secondary BIOS using firmware hub (FWH) for COM.0 Rev. 1.0
modules and Serial Peripheral Interface (SPI) for COM.0 Rev. 2.0 modules. Secondary BIOS
solutions can be used as an alternative to the on-module BIOS and provide support for the
following:
Testing new BIOS versions
Development of firmware modifications
Recovery if soldered BIOS on module is corrupted
7.1

FWH Secondary BIOS - COM.0 Rev. 1.0

The firmware hub (FWH) is supported by PICMG COM.0 Rev. 1.0 to provide a Secondary BIOS
for COM Express Rev. 1.0 modules that support a FWH Secondary BIOS (not supported by
COM.0 Rev.1.0 modules with SPI BIOS).
When using the FWH Secondary BIOS, the soldered BIOS on the module does not need
to be removed.
Express-BASE User's Manual
To use the BIOS on the module:
Short pins 1-2 on both JPZ5 and JP2.
To use the FWH BIOS on the carrier board:
Short pins 1-2 on JPZ5 and pins 2-3 on JP2.
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