w83c554f Winbond Electronics Corp America, w83c554f Datasheet - Page 40

• Manufacturer Part Number: w83c554f
• Description: System I/o Controller With Pci Arbiter & Ultradma/33 Ide Controller
• Manufacturer: Winbond Electronics Corp America

W83C554F
System Architecture
3.11
PCI Memory Write
The Master Memory Write command (C/BE[3:0]# = 7h during the address phase) cycle is used by the W83C554F when
writing to memory. The W83C554F issues a request for the bus and, when granted access, writes one Dword to system
memory. The bus is then released. The data phase in Figure 3-7 takes two clock cycles, as determined by TRDY#.
In slave mode, PCI-to-ISA memory writes and ROM writes are supported.
Figure 3-7. Master Memory Write
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