ADSP-2181 is a DSP microcomputer with a 25ns instruction cycle time, 40MIPS sustained performance, single-cycle instruction execution and single-cycle context switching.
This handbook describes the ADSP-2181 single‑chip microcomputer optimized for digital signal processing. It includes a functional block diagram, key features such as a 25 ns instruction cycle, 40 MIPS performance, and 80 KB on‑chip RAM configured as 16 K‑word program and data memories. Package options are 128‑lead TQFP and PQFP.
The document also covers the development system, architecture overview, pin descriptions, interrupt handling, low‑power modes, and typical system interface configurations. Detailed specifications and programming resources are provided for designers and engineers working with the ADSP‑2181.
| Instruction Cycle Time | 25 ns |
|---|---|
| Sustained Performance | 40 MIPS |
| On‑Chip RAM | 80 KB |
| Program Memory | 16 K words |
| Data Memory | 16 K words |
| Package Types | 128‑lead TQFP and 128‑lead PQFP |
The ADSP-2181 operates with a 25 ns instruction cycle time when using a 20 MHz crystal at 5.0 V.
The processor can respond to up to 13 possible interrupts, including four dedicated external interrupt input pins.
The ADSP-2181 is offered in 128‑lead TQFP and 128‑lead PQFP packages.