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