The ADSP-21xx is a 16-bit fixed-point DSP microprocessor with on-chip memory from Analog Devices, which has an enhanced Harvard architecture for three-bus performance, including instruction bus and dual data buses. The independent computing units include ALU, multiplier / accumulator and shifter, supporting single-cycle instruction execution and multi-function instructions. The on-chip program memory is RAM or ROM and the data memory is RAM. It also integrates serial ports, timers and host interface ports (only for ADSP-2111).
