PCI-ISA Bridge

Key Features

• Compliant with PCI bus specification 2.1 and 2.2.
• Convert PCI transaction to ISA bus transaction.
• Function as PCI target on PCI bus.
• Function as ISA master on ISA bus.
• Map PCI address space to ISA address space through Base Address Register.
• Supports 16-bit and 8-bit data transfer, memory and IO transfers on ISA bus.
• ISA bus operates on one-fourth the frequency of the PCI clock.
• Performs multiple ISA operations to transfer each 32-bit PCI word.
• Write buffer to speed up PCI-to-ISA write transfer.
• Support ISA devices with different speed by using NOWS# and CHRDY signals.
• Parity generation and parity error detection on PCI bus.
• Includes all PCI specific configuration registers.
• Fully synchronous design, no gated clock or transparent latch. All flip-flops are rising edge trigger.

Block Diagram

Technical Specifications