SPI_CmdValue1 Register- RW - 32 bits - [Mem_Reg 14h]
Field Name
WREN
WRDI
RDID
RDSR
Note: Either the SpiAccessMacRomEn and/or the SpiHostAccessRomEn bit is cleared. All of these registers
become read only and cannot be changed.
SPI_CmdValue2 Register- RW - 32 bits - [Mem_Reg 18h]
Field Name
Read
FRead
PAGEWR
BYTEWR
Note: Either the SpiAccessMacRomEn and/or the SpiHostAccessRomEn bit is cleared. All of these registers
become read only and cannot be changed.
Field Name
SPI_FakeID
©2008 Advanced Micro Devices, Inc.
AMD SB600 Register Reference Manual
Bits
Default
7:0
06h
This is used to compare against the opcode sent out by the
MAC. This is a predefined value to decode for the WREN (write
enable) command from the MAC. In the bridge mode, SB600
will need to decode commands from the MAC
15:8
04h
This is used to compare against the opcode sent out by the
MAC. This is a predefined value to decode for the WRDI (write
disable) command from the MAC.
23:16
9Fh
This is used to compare against the opcode sent out by the
MAC. This is a predefined value to decode for the RDID (read
ID) command from the MAC
31:24
05h
This is used to compare against the opcode sent out by the
MAC. This is a predefined value to decode for the RDSR (read
status register) command from the MAC
Bits
Default
7:0
03h
This is used to compare against the opcode sent out by the
MAC. This is a predefined value to decode for the Read (Read
byte) command from the MAC. In the bridge mode, SB600 will
need to decode commands from the MAC
15:8
0Bh
This is used to compare against the opcode sent out by the
MAC. This is a predefined value to decode for the FRead (fast
read) command from the MAC.
23:16
0Ah
This is used to compare against the opcode sent out by the
MAC. This is a predefined value to decode for the PAGEWR
(page write) command from the MAC
31:24
02h
This is used to compare against the opcode sent out by the
MAC. This is a predefined value to decode for the BYTEWR
(byte write) command from the MAC.
SPI_FakeID Register- RW - 8 bits - [Offset 1Ch]
Bits
Default
7:0
FFh
This is used as the faked ID value to be returned to the MAC as
a response to the RDID command. This is only used under the
bridge mode.
Description
Description
Description
LPC ISA Bridge (Device 20, Function 3)
Proprietary
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