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PC87200VUL160A Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # PC87200VUL160A
Description  PC87200 PCI to ISA Bridge
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87200VUL160A Datasheet(HTML) 1 Page - National Semiconductor (TI)

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© 1999 National Semiconductor Corporation
www.national.com
August 1999
PC87200 PCI to ISA Bridge
1.0 General Description
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.
2.0 Features
2.1 General
– Functionally compatible with Intel 82380AB
– 5.0 V tolerant PCI and ISA interfaces
– Slave mode serialized IRQ support for both quiet and
continuous modes
– PC/PCI DMA support
– 32-bit address decode for the 1MB BIOS ROM
– Supports ISA bus mastering
– 160-pin PQFP package
2.2 PCI-to-ISA Bridge
– PCI 2.1 compliant 33 MHz bus
– 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
– Supports 4 ISA slots directly without buffering
– Programmable ISA clock (8.33 to 11 MHz)
– Slow slew rate on edges
2.3 "PROHIBIT" functional support
– Disables PCI bus subtractive decoding when PRO-
HIBIT is asserted
Block Diagram
X-Bus
ISA Bus
PCI Bus
PCI to X-Bus / X-Bus to PCI Bridge
PCI Configuration
Registers
X-Bus Arbiter
PC87200 Support
Serial IRQ Slave
mode interface logic
Serialized IRQ
Interface
PC/PCI DMA
Interface
ISA bus Target
Interface
ISA bus Master
Interface
PCPCIREQ#
PCPCIGNT#
Decoding logic
BPD#
PROHIBIT
TRI-STATE® is a registered trademark of National Semiconductor Corporation.


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