Detailed hardware description
Issue G 121
Unique ID
A Unique ID is provided on the APOLLO using the DS2401 enhanced silicon serial
number IC. The DS2401 consists of a factory-lasered 64 bit ROM that includes a unique
48 bit serial number, an 8 bit CRC and an 8 bit family code (01h). The DS2401 has been
configured on the APOLLO to interface via two ICH4 GPIO pins:
ICH4 GPIO Signal name
GPI7 Serial output
GPIO26 Serial input
DS2401
3.3V
ICH4 GPI7
ICH4 GPIO26
The Unique ID 48 bit serial number is read by the BIOS and can be displayed during
boot. This is provided as an option in the BIOS Security menu - see page 81
.
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