The ADSP-2191M DSP is a single-chip microcomputer optimized for digital signal processing (DSP) and other high speed numeric processing applications.
The ADSP-2191M combines the ADSP-219x family base architecture (three computational units, two data address generators, and a program sequencer) with three serial ports, two SPI-compatible ports, one UART port, a DMA controller, three programmable timers, general-purpose Programmable Flag pins, extensive interrupt capabilities, and on-chip program and data memory spaces.
The ADSP-2191M architecture is code-compatible with DSPs of the ADSP-218x family. Although the architectures are compatible, the ADSP-2191M architecture has a number of enhancements over the ADSP-218x architecture. The enhancements to computational units, data address generators, and program sequencer make the ADSP-2191M more flexible and even easier to program.
Indirect addressing options provide addressing flexibility—premodify with no update, pre- and post-modify by an immediate 8-bit, two’s-complement value and base address registers for easier implementation of circular buffering.
- 6.25ns instruction cycle time, for up to 160 MIPS sustained performance
- ADSP-218x family code compatible with the same easy to use algebraic syntax
- Single-cycle instruction execution
- Single-cycle context switch between two sets of computation and memory instructions
- Instruction cache allows dual operand fetches in every instruction cycle
- Unified memory space allows flexible address generation, using two independent DAG units
- Powerful program sequencer provides zero-overhead looping and conditional instruction execution
- Enhanced interrupt controller enables programming of interrupt priorities and nesting modes
