參數(shù)資料
型號: W83C554F
英文描述: W83C554F Highly Integrated System I/O Controller for Power PC TM (South Bridge) & UltraDMA/33 IDE Controller QFP 208
中文描述: W83C554F高度集成的系統(tǒng)的I / O控制器的Power PC商標(biāo)(南橋)
文件頁數(shù): 58/159頁
文件大?。?/td> 3991K
代理商: W83C554F
W83C553F
Electrical Specifications
WINBOND SYSTEMS LABORATORY
55
Command Register (default = 0007h)
Type:
Read/Write
Bit Description
:
Bits [15:10]:
Reserved. These read only bits are all set to "0".
Bit 9:
Fast Back-to-Back Enable. W83C553F does not generate fast back-to-back cycles. This read
only bit is set to "0".
Bit 8:
SERR# Enable. W83C553F does not drive the SERR# pin. Defaults to "0".
Bit 7:
Wait Cycle Control. W83C553F does not use address/data stepping. This read only bit is set
to "0".
Bit 6:
Parity Error Response. This is a read/write bit.
Bit 5:
VGA Palette Snoop. W83C553F is not a VGA device. This read only bit is set to "0".
Bit 4:
Memory Write and Invalidate Enable. W83C553F does not generate memory write and
invalidate commands. This read only bit is set to "0".
Bit 3:
Special Cycles. W83C553F ignores all special cycles when reset. Defaults to "0".
Bit 2:
Bus Master. Always enabled. This read only bit is set to "1".
Bit 1:
Memory Space. Always enabled. This read only bit is set to "1".
Bit 0:
I/O Space. Always enabled. This read only bit is set to "1".
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