
PCI TO ISA BRIDGE SET
W83628F & W83629D
PRELIMINARY
Publication Release Date: Dec 1998
Revision 0.32
- 1 -
GENERAL DESCRIPTION
W83628F is a PCI-to-ISA bus conversion IC. W83629D is a condensed centralizer
IC for IRQ and DMA control. W83628F and W83629D together form a complete set
for the PCI-to-ISA bridge.
For the new generation Intel chipset Camino and Whitney, featuring LPC bus, there
is no support for ISA bus and slots. However the demand of ISA devices still exist.
For such case, W83628F plus W83629D are the best companion solution for the
non-ISA chipset. Also the packages of W83628F (128-QFP) and W83629D (48-
LQFP) had been chosen to be the most economic solution for save the M/B board
layout size and cost.
For the new generation chipset featuring LPC interface and support no ISA bus,
W83627HF/F (Winbond LPC I/O) together with the set of W83628F and W83629D
is the complete solution.
FEATURES
PCI to ISA Bridge
Full ISA Bus Support including ISA Masters
5V ISA and 3.3V PCI interfaces
PC/PCI DMA protocol for Software Transparent
IRQ Serializer for ISA Parallel IRQ transfer to Serial IRQ
Supports 3 fully ISA Compatible Slots without Buffering
PCI Bus at 25MHz, 33MHz and up to 40MHz
Supports Programmable ISA Bus Divide the PCI Bus Clock into 3 or 4
All ISA Signals can be Isolate
Supports Configuration registers for programming performance
PACKAGE
128-pin PQFP for W83628F
48-pin LQFP for W83629D