ADSP-2181 is a single-chip microcomputer launched by Cypress Company. It has high performance, low power consumption and multifunctional features. It adopts a 3-bus architecture, supports dual-operand fetching in every instruction cycle, and single-cycle instruction execution. ADSP-2181 also has independent ALU, multiplier/accumulator and barrel shifter computational units, as well as two independent data address generators and powerful program sequencer. In addition, ADSP-2181 also integrates a 16-bit internal DMA port for high-speed access to on-chip memory.
The ADSP-2181 is a single‑chip DSP microcomputer optimized for high‑speed numeric processing. It offers a 25 ns instruction cycle, 40 MIPS sustained performance, and 80 KB of on‑chip RAM configured as 16 K words of program memory and 16 K words of data memory. The device is available in 128‑lead TQFP and PQFP packages and includes a 16‑bit internal DMA port, a byte‑wide DMA port, and a 4 MB external memory interface.
The architecture features three independent computational units (ALU, MAC, shifter), two double‑buffered serial ports with optional companding, up to 13 interrupt sources, and three low‑power modes (Power‑Down, Idle, Slow Idle). Development tools such as the EZ‑ICE emulator and EZ‑KIT Lite evaluation board are supported, providing debugging, simulation, and rapid prototyping capabilities.
| Instruction cycle time | 25 ns (from 20 MHz crystal) |
|---|---|
| Sustained performance | 40 MIPS |
| On‑chip RAM | 80 KB |
| On‑chip program memory | 16 K words |
| On‑chip data memory | 16 K words |
| Package options | 128‑Lead TQFP / 128‑Lead PQFP |
| Internal DMA port | 16‑bit |
| External memory interface | 4 MB |
| Interrupt sources | 13 possible interrupts |
| Serial ports | Two double‑buffered serial ports |
| Programmable timer | 16‑bit interval timer |
The ADSP-2181 executes each instruction in 25 ns when driven by a 20 MHz crystal.
It includes 80 KB of on‑chip RAM, configured as 16 K words of program memory and 16 K words of data memory.
The processor can handle up to six external interrupts, plus additional internal sources.
The ADSP-2181 offers Power‑Down, Idle, and Slow Idle modes to reduce power consumption.