SiI0680A PCI to IDE/ATA
Data Sheet
Silicon Image, Inc.
9.7.17 EEPROM Memory Address – Command + Status
Address Offset: 58H
Access Type: Read/Write
Reset Value: 0x0000_0000
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
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.
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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.
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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.
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•
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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.
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9.7.18 EEPROM Memory Data
Address Offset: 5CH
Access Type: Read/Write
Reset Value: 0x0000_0000
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.
© 2006 Silicon Image, Inc.
SiI-DS-0069-C
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