82C881 Datasheet, PDF (21/46 Pages) List of Unclassifed Manufacturers – FireLink 1394 OHCI Link Controller

FireLink 1394 OHCI
82C881
3. Write the start address in PCICFG 50h[7:0].
4. Set PCICFG 53h[1]=1 to start the write operation.
5. When PCICFG 53h[1] reads back 0, the operation is complete and and PCICFG 53h[2] contains the operation status: 0
for OK, 1 for ERROR.
If an error occurs, the software should clear PCICFG 53h[2] before re-trying EEPROM operations.
4.2.3 Related PCICFG Registers
7
PCICFG 50h
PCICFG 51h
PCICFG 52h
PCICFG 53h
Reserved
PCICFG 54h
PCICFG 55h
PCICFG 56h
PCICFG 57h
PCICFG 58h
PCICFG 59h
PCICFG 5Ah
PCICFG 5Bh
6
5
4
3
2
1
EEPROM Start Address Register
Starting address for transfer to or from EEPROM
Reserved
Reserved
EEPROM Control Register
Byte count - Must be loaded with value from 1 to 8 prior to issuing
read or write command
ERROR
0: operation
successful
Writing 1
initiates Write.
Read:
1: error
1: EEPROM
This bit must be
cleared by
write in
progress
software
0: Write
complete
EEPROM Data
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7
0
Default = 00h
Default = 00h
Default = 00h
Default = 00h
Writing 1
initiates Read.
Read:
1: EEPROM
read in
progress
0: Read
complete
Default = 00h
Default = 00h
Default = 00h
Default = 00h
Default = 00h
Default = 00h
Default = 00h
Default = 00h
912-2000-031
Revision: 1.0
®
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