HD63450RCP12

Overview

The HD63450RCP12 is a CMOS Direct Memory Access (DMA) controller manufactured by Renesas Electronics, originally developed by Hitachi. It provides four independent DMA channels and supports an 8 MHz maximum clock frequency. The device features a 24-bit address bus width and a 16-bit external data bus width, ensuring compatibility with the Motorola 68000 bus architecture. It operates at a standard 5 V supply voltage and is housed in a 64-pin Plastic Dual In-line Package (PDIP-64). Key operational modes include cycle steal with or without hold, burst transfer, and auto-request transfer, alongside fixed and rotational priority interrupt modes.

Feature Summary

• Supports multiple DMA transfer modes including cycle steal, burst, and auto-request operations.
• Offers flexible priority management through fixed and rotational interrupt modes.
• Ensures system compatibility via adherence to the 68000 bus interface standard.

Applications

• High-speed data transfer between memory and I/O devices in embedded systems.
• Data acquisition systems requiring efficient buffer management without CPU intervention.
• Industrial control applications utilizing 68000-based microprocessor architectures.

Procurement Notes

Verify the component's RoHS compliance status prior to procurement, as official documentation indicates it may not be compliant. Confirm the specific package variant matches the required PCB footprint. Ensure the operating temperature range aligns with the intended environmental conditions. Validate that the 5 V power supply requirement is compatible with the target system design.

Selection Notes

Select this component when designing systems based on the 68000 bus architecture that require dedicated hardware for high-throughput data movement. It is suitable for applications needing four distinct DMA channels with configurable priority schemes. Consider the PDIP-64 package constraints regarding board space and thermal dissipation. Evaluate the 8 MHz speed limit against the system's clock requirements to ensure adequate performance margins.

Part Context

The HD63450 series belongs to the family of peripheral controllers designed for legacy and industrial microprocessor systems. Originally introduced by Hitachi, the product line was transferred to Renesas Electronics following corporate restructuring. This specific part serves as a standalone DMA solution, complementing central processing units that lack integrated high-performance direct memory access capabilities.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Verify functional equivalence with other 68000-compatible DMA controllers if cross-referencing is necessary.