w83c553f Winbond Electronics Corp America, w83c553f Datasheet - Page 47
w83c553f
Manufacturer Part Number
w83c553f
Description
System I/o Controller With Pci Arbiter
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83C553F.pdf
(159 pages)
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W83C553F
Electrical Specifications
3.14.4
PCI Preemption Timing
The main arbiter can void the PCI GNT# signal sent to the W83C553F, if the current bus cycle takes too long, as in the case
of DMA bursts. When PCI GNT# is removed, and the value in the Latency Timer Register has reached zero, the W83C553F
will finish the current transfer, and immediately release the bus. The timer in the W83C553F PCI configuration space is
programmable. The W83C553F will keep PCI REQ# asserted to regain bus ownership.
Figure 3-12. Preemption Timing
WINBOND SYSTEMS LABORATORY
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