OXMPCI952 Datasheet, PDF (79/108 Pages) Oxford Semiconductor – Integrated High Performance Dual UARTs, 8-bit Local Bus/Parallel Port. 3.3v PCI/miniPCI interface.

OXFORD SEMICONDUCTOR LTD.
OXmPCI952
9.1.1 Zone 0: Header
The header identifies the EEPROM program as valid.
Bits
Description
15:8 These bits should return 0x96 to identify a valid
program. Once the OXmPCI952 reads 0x96 from
these bits, it sets LCC[28] to indicate that a valid
EEPROM program is present.
7 Reserved. Write ‘0’ to this bit.
6 Reserved. Write ‘0’ to this bit.
5 Reserved. Write ‘0’ to this bit.
4 1 = Zone1 (Local Configuration) exists
0 = Zone1 does not exist
3 1 = Zone2 (Identification) exists
0 = Zone2 does not exist
2 1 = Zone3 (PCI Configuration) exists
0 = Zone3 does not exist
1 1 = Zone4 (Power Management Zone) exists
0 = Zone4 does not exist
0 1 = Zone5 (Function Access Zone) exists
0 = Zone5 does not exist
EEPROM Header
The programming data for each zone follows the proceeding zone if it exists.
For example a Header value of 0x961F indicates that all zones exist and they follow one another in sequence, while 0x9605
indicates that only Zones 3 and 5 exist where the header data is followed by Zone3 WORDs, and since Zone4 is missing, Zone3
WORDs are followed by Zone5 WORDs.
DS-0020 Jun 05
Page 79