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(南橋)
文件頁數(shù): 38/159頁
文件大?。?/td> 3991K
代理商: W83C554F
W83C553F
3.7
Bursting is not supported by the W83C553F for I/O cycles, so a target disconnect will be executed after the first data transfer
on all I/O Write commands to prevent multiple I/O data phases.
Refer to Figure 3-3.
The Slave I/O Write command (C/BE[3:0]# = 3h during address phase) is used by the processor to
write the W83C553F internal bus master registers, IDE device, and ISA registers or X-bus registers. It is a single, non-burst,
8, 16 or 32-bit transfer cycle, initiated by the CPU. It is a fixed duration, i.e. the W83C553F will assert TRDY# on the 4th
bus cycle of the transfer when accessing the internal bus master registers. It will have a variable duration when accessing an
IDE device or ISA register.
Electrical Specifications
WINBOND SYSTEMS LABORATORY
35
PCI I/O Write Cycle
Figure 3-3. Slave I/O Write Timing
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