Datasheet > PC87200VUL160A

PC87200VUL160A

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
美国国家半导体 - NSC		PC
页数	文件大小	规格书
33页	116K
描述
PC87200 PCI to ISA Bridge

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数据手册

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PC87200VUL160A 数据手册

August 1999

PC87200 PCI to ISA Bridge

2.2 PCI-to-ISA Bridge

1.0 General Description

– PCI 2.1 compliant 33 MHz bus

The PC87200 Enhanced Integrated PCI-to-ISA bridge

works with an LPC chipset to provide ISA slot support. It is

a complement to the National Semiconductor PC8736x

Super I/O family.

– Supports PCI initiator-to-ISA and ISA master-to-PCI

cycle translations

– Subtractive agent for unclaimed transactions (see the

PROHIBIT signal description for exceptions)

– Parallel to Serial IRQ conversion including

IRQ3,4,5,6,7,9,10,11,12,14,15

2.0 Features

– Supports 4 ISA slots directly without buffering

– Programmable ISA clock (8.33 to 11 MHz)

– Slow slew rate on edges

2.1 General

– Functionally compatible with Intel 82380AB

– 5.0 V tolerant PCI and ISA interfaces

2.3 "PROHIBIT" functional support

– Slave mode serialized IRQ support for both quiet and

continuous modes

– Disables PCI bus subtractive decoding when PRO-

HIBIT is asserted

– PC/PCI DMA support

– 32-bit address decode for the 1MB BIOS ROM

– Supports ISA bus mastering

– 160-pin PQFP package

Block Diagram

PCI Bus

Serialized IRQ

Interface

PC87200 Support

PCI to X-Bus / X-Bus to PCI Bridge

PCI Conﬁguration

Registers

Decoding logic

PROHIBIT

BPD#

X-Bus Arbiter

X-Bus

PCPCIREQ#

PCPCIGNT#

ISA bus Master

Interface

ISA bus Target

Interface

PC/PCI DMA

Interface

Serial IRQ Slave

mode interface logic

ISA Bus

TRI-STATE® is a registered trademark of National Semiconductor Corporation.

www.national.com

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