GENERAL DESCRIPTION

The ADSP-21991 is a mixed signal DSP controller based on the ADSP-219x DSP Core, suitable for a variety of high performance industrial motor control and signal processing applications that require the combination of a high performance DSP and the mixed signal integration of embedded control peripherals such as analog-to-digital conversion.

KEY FEATURES

ADSP-219x, 16-Bit, Fixed Point DSP Core with up to

160 MIPS Sustained Performance

40K Words of On-Chip RAM, Configured as 32K Words

On-Chip 24-Bit Program RAM and 8K Words On-Chip

16-Bit Data RAM

External Memory Interface

Dedicated Memory DMA Controller for Data/Instruction

Transfer between Internal/External Memory

Programmable PLL and Flexible Clock Generation

Circuitry Enables Full Speed Operation from Low

Speed Input Clocks

IEEE JTAG Standard 1149.1 Test Access Port Supports

On-Chip Emulation and System Debugging

8-Channel, 14-Bit Analog-to-Digital Converter System,

with up to 20 MSPS Sampling Rate (at 160 MHz Core

Clock Rate)

Three Phase 16-Bit Center Based PWM Generation Unit

with 12.5 ns Resolution at 160 MHz Core Clock (CCLK)

Rate

Dedicated 32-Bit Encoder Interface Unit with

Companion Encoder Event Timer

Dual 16-Bit Auxiliary PWM Outputs

16 General-Purpose Flag I/O Pins

Three Programmable 32-Bit Interval Timers

SPI Communications Port with Master or Slave

Operation

Synchronous Serial Communications Port (SPORT)

Capable of Software UART Emulation

Integrated Watchdog Timer

Dedicated Peripheral Interrupt Controller with Software

Priority Control

Multiple Boot Modes

Precision 1.0 V Voltage Reference

Integrated Power-On-Reset (POR) Generator

Flexible Power Management with Selectable Power-Down and Idle Modes

2.5 V Internal Operation with 3.3 V I/O

Operating Temperature Range of –40ºC to +85ºC

196-Ball Mini-BGA Package

176-Lead LQFP Package

TARGET APPLICATIONS

Industrial Motor Drives

Uninterruptible Power Supplies

Optical Networking Control

Data Acquisition Systems

Test and Measurement Systems

Portable Instrumentation