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): 40/159頁
文件大?。?/td> 3991K
代理商: W83C554F
W83C553F
3.9
The Configuration Write command (C/BE[3:0]# = Bh during address phase) is used in slave mode to write to the
configuration registers. 8-bit, 16-bit, 24-bit and 32-bit accesses are supported when the IDSEL is asserted and AD[1:0] are
00. The PCI controller will respond to all Configuration write cycles, even for bytes not used. During the PCI address phase
AD[7:2] define the DWORD accessed, while the byte enables (C/BE[3:0]#) address the byte(s) within each DWORD.
Refer to Figure 3-5. The Slave Configuration Write command cycle is used by the host processor to write the PCI
configuration space in the W83C553F. This permits the processor to control basic W83C553F activity, such as
enable/disable, change I/O location, etc. It is a single, non-burst, 8, 16 or 32-bit transfer, of fixed duration, i.e. the
W83C553F will assert TRDY# on the 4th bus cycle of the transfer.
Electrical Specifications
WINBOND SYSTEMS LABORATORY
37
PCI Configuration Write Cycle
Figure 3-5. Slave Configuration Write Timing
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