SUPPORTING EXTERNAL DMA ACTIVITY TO INTERNAL RAM FOR TMS320C5X

This document discusses how to use the DMA capability of TMS320C5x devices with the thin-quad-flat package. The problem is that when moving to the small outline and footprint of the thin-quad-flat package (TQFP) for TMS320C5x devices, some functionality is removed to reduce pin count. This move from the 132-pin quad-flat package (PQ package) to the 100-pin TQFP (PZ package) removes two functional pins: interrupt acknowledge (IACK) and instruction acquisition (IAQ). Aside from its traditional function, the IAQ pin is also used to acknowledge the bus request (BR) signal for external DMA access to the single access RAM.

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