PC87200160A National Semiconductor, PC87200160A Datasheet - Page 14

• Manufacturer Part Number: PC87200160A
• Description: PC87200 PCI to ISA Bridge
• Manufacturer: National Semiconductor

5.0 Pin Descriptions
5.3.6 PC/PCI signals
5.3.7 Power, Ground, and Reserved Terminals
PCPCIREQ#
PCPCIGNT#
VDD
VSS
Signal Name
113,121,
114,122,
1,19,39,
139,150
2,20,40,
140,151
Pin No.
97,105,
98,106,
59,71,
79,89,
60,72,
80,90,
125
126
(Continued)
Type
PWR
GND
O
I
PC/PCI Bus Request
The PC87200 asserts PCPCIREQ# using the PC/PCI DMA request protocol in
response to a DMA request or ISA master request to gain ownership of the PCI
bus. The PCPCIREQ# and PCPCIGNT# signals are used to arbitrate for the PCI
bus.
PC/PCI Bus Grant
PCPCIGNT# is asserted using the PC/PCI DMA grant protocol by an arbiter that
indicates to the PC87200 that access to the PCI bus has been granted.
3.3V (nominal) Power Connection
Ground Connection
14
Description
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