GENERAL DESCRIPTION
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 gener ators, 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 enhance ments to computational units, data address generators, and program sequencer make the ADSP-2191M more flexible and even easier to program.

PERFORMANCE FEATURES
   6.25 ns 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
   Multifunction Instructions
   Pipelined Architecture Supports Efficient Code Execution
   Architectural Enhancements for Compiled C and C++ Code Efficiency
   Architectural Enhancements beyond ADSP-218x Family
   are Supported with Instruction Set Extensions for Added Registers, and Peripherals
   Flexible Power Management with User-Selectable Power-Down and Idle Modes

INTEGRATION FEATURES
   160 K Bytes On-Chip RAM Configured as 32K Words 24-Bit Memory RAM and 32K Words 16-Bit Memory RAM
   Dual-Purpose 24-Bit Memory for Both Instruction and Data Storage
   Independent ALU, Multiplier/Accumulator, and Barrel
      Shifter Computational Units with Dual 40-bit Accumulators
   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

SYSTEM INTERFACE FEATURES
   Host Port with DMA Capability for Glueless 8- or 16-Bit Host Interface
   16-Bit External Memory Interface for up to 16M Words of Addressable Memory Space
   Three Full-Duplex Multichannel Serial Ports, with
      Support for H.100 and up to 128 TDM Channels with
      A-Law and μ-Law Companding Optimized for Telecom
      munications Systems
   Two SPI-Compatible Ports with DMA Support
   UART Port with DMA Support
   16 General-Purpose I/O Pins with Integrated Interrupt Support
   Three Programmable Interval Timers with PWM
      Generation, PWM Capture/Pulsewidth Measurement,
      and External Event Counter Capabilities
   Up to 11 DMA Channels Can Be Active at Any Given Time for High I/O Throughput
   On-Chip Boot ROM for Automatic Booting from External
   8- or 16-Bit Host Device, SPI ROM, or UART with Autobaud Detection
   Programmable PLL Supports 1x to 32x Input Frequency
   Multiplication and Can Be Altered during Runtime
      IEEE JTAG Standard 1149.1 Test Access Port Supports
   On-Chip Emulation and System Debugging 2.5 V Internal Operation and 3.3 V I/O
   144-Lead LQFP and 144-Ball Mini-BGA Packages