National Semiconductor PC87200 overview
National Semiconductor PC87200 PCI-to-ISA Bridge The PC87200 Enhanced Integrated PCI-to-ISA bridge works with an LPC chipset to provide ISA slot support. It is ...
Product details
Manufactured byNational Semiconductor
Product groupIntegrated Circuit
DescriptionNational Semiconductor PC87200 PCI-to-ISA Bridge
OverviewThe 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.
Key Features• 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• 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
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