pi7c8154a Pericom Semiconductor Corporation, pi7c8154a Datasheet - Page 89

• Manufacturer Part Number: pi7c8154a
• Description: 2-port Pci-to-pci Bridge
• Manufacturer: Pericom Semiconductor Corporation

14.1.36
14.1.37
14.1.38
EEPROM AUTOLOAD CONTROL / STATUS REGISTER – OFFSET 50h
EEPROM ADDRESS / CONTROL REGISTER – OFFSET 54h
EEPROM DATA REGISTER – OFFSET 54h
Bit
15:0
16
17
18
31:19
Bit
0
1
2
3
5:4
7:6
8
15:9
Bit
31:16
Function
Reserved
EEPROM
Autoload Control
Fast EEPROM
Autoload Control
EEPROM
Autoload Status
Reserved
Function
EEPROM Read
or Write Cycle
Start
Command for
EEPROM
EEPROM Error
EEPROM
Autoload
Complete Status
Reserved
EEPROM Clock
Frequency
Reserved
EEPROM Word
Address
Function
EEPROM Data
Type
R/O
R/W
R/W
R/O
R/O
Type
R/W
R/W
R/O
R/O
R/O
R/W
R/O
R/W
Type
R/W
Page 89 of 112
Description
Returns 0 when read. Reset to 0.
0: Enable EEPROM autoload
1: Disable EEPROM autoload
Reset to 0
0: Normal speed of EEPROM autoload
1: Speeds up EEPROM autoload by 32X
Reset to 0
0: EEPROM autoload is not ongoing
1: EEPROM autoload is on going
Reset to 0
Returns 0 when read. Reset to 0.
Description
Controls the command sent to the EEPROM
0: Read
1: Write
Reset to 0
0: EEPROM acknowledge is always received during the EEPROM cycle.
1: EEPROM acknowledge is not received during the EEPROM cycle.
Reset to 0
0: EEPROM autoload is not successfully completed
1: EEPROM autoload is successfully completed.
Reset to 0
Returns 0 when read. Reset to 0
00: Primary clock / 1024
01: Primary clock / 512
10: Primary clock / 256
11: Primary clock / 32
Reset to 0
Returns 0 when read. Reset to 0.
Stores the EEPROM word address for the EEPROM cycle.
Reset to 0
Description
Stores the EEPROM data to be written into the EEPROM or receives the
data from the EEPROM after an EEPROM read cycle is completed.
ASYNCHRONOUS 2-PORT
JULY 2004 REVISION 1.00
PCI-to-PCI BRIDGE
Advance Information
PI7C8154A