ADSP-21990BBC datasheet(2/50 Pages) AD

2 / 50 page

Rev. A

Page 2 of 50

August 2007

ADSP-21990

TABLE OF CONTENTS

General Description ................................................. 3

DSP Core Architecture ........................................... 3

Memory Architecture ............................................ 5

Bus Request and Bus Grant ..................................... 6

DMA Controller ................................................... 6

DSP Peripherals Architecture .................................. 7

Serial Peripheral Interface (SPI) Port ......................... 7

DSP Serial Port (SPORT) ........................................ 8

Analog-to-Digital Conversion System ........................ 8

Voltage Reference ................................................. 9

PWM Generation Unit ........................................... 9

Auxiliary PWM Generation Unit .............................. 9

Encoder Interface Unit ........................................... 9

Flag I/O (FIO) Peripheral Unit ............................... 10

Watchdog Timer ................................................ 10

General-Purpose Timers ....................................... 10

Interrupts ......................................................... 10

Peripheral Interrupt Controller .............................. 11

Low Power Operation .......................................... 12

Clock Signals ...................................................... 12

Reset and Power-On Reset (POR) ........................... 13

Power Supplies ................................................... 13

Booting Modes ................................................... 13

Instruction Set Description .................................... 14

Development Tools .............................................. 14

Designing an Emulator-Compatible DSP Board .......... 15

Additional Information ........................................ 15

Pin Function Descriptions ........................................ 16

Specifications ........................................................ 19

Absolute Maximum Ratings ................................... 24

ESD Caution ...................................................... 24

Timing Specifications ........................................... 24

Power Dissipation ............................................... 40

Test Conditions .................................................. 40

Pin Configurations ................................................. 42

Outline Dimensions ................................................ 48

Ordering Guide ..................................................... 49

REVISION HISTORY

8/07—Rev. 0 to Rev. A

Added RoHS part number to Ordering Guide .............. 49

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