
Silicon Image, Inc. 
9.7.17
EEPROM Memory Address – Command + Status 
Address Offset: 58
H 
Access Type: Read/Write 
Reset Value: 0x0000_0000 
SiI0680A PCI to IDE/ATA  
Data Sheet
 2006 Silicon Image, Inc. 
SiI-DS-0069-C
81 
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
M
Reserved 
M
M
R
M
Reserved 
Mem Address 
This register defines the address and command/status register for EEPROM memory interface in the SiI 0680A.  The register 
bits are defined below.  
Bit [31:29]
:  Reserved (R).  This bit field is reserved and returns zeros on a read. 
Bit [28]
:  Mem Error (R/W1C) – Memory Access Error.  This bit set indicates that the EEPROM interface logic 
detects three NAKs from the memory device.  
Bit [27]
:  Mem Init Done (R) – Memory Initialization Done.  This bit set indicates that the memory initialization 
sequence is done.  The memory initialization sequence is activated upon the release of reset. 
Bit [26]
:  Reserved (R) This bit is reserved and returns an indeterminate value on a read. 
Bit [25]
:  Mem Access Start (R/W) – Memory Access Start.  This bit is set to initiate an operation to EEPROM 
memory. This bit is cleared by the chip when the operation is complete. 
Bit [24]
:  Mem Access Type (R/W) – Memory Access Type.  This bit is set to define a read operation from 
EEPROM memory.  This bit is cleared to define a write operation to EEPROM memory. 
Bit [23:16]
:  Reserved (R).  This bit field is reserved and returns zeros on a read. 
Bit [15:00]
:  Memory Address (R/W).  This bit field is programmed with the address for an EEPROM memory 
read or write access. 
9.7.18
Address Offset: 5C
H 
Access Type: Read/Write 
Reset Value: 0x0000_0000 
EEPROM Memory Data 
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Reserved 
Memory  Data 
This register defines the data register for EEPROM memory interface in the SiI 0680A.  The system writes to this register for a 
write operation to EEPROM memory, and reads from this register on a read operation from EEPROM memory.  The register 
bits are defined below.  
Bit [31:08]
:  Reserved (R).  This bit field is reserved and returns zeros on a read. 
Bit [07:00]
:  Memory Data (R/W) – EEPROM Memory Data.  This bit field is used for EEPROM write data on a 
write operation, and returns the EEPROM read data on a read operation.