GENERAL DESCRIPTION

The ADSP-2185 is a single-chip microcomputer optimized for digital signal processing (DSP) and other high speed numeric processing applications.

FEATURES

PERFORMANCE

30 ns Instruction Cycle Time 33 MIPS Sustained Performance

Single-Cycle Instruction Execution

Single-Cycle Context Switch

3-Bus Architecture Allows Dual Operand Fetches in Every Instruction Cycle

Multifunction Instructions

Power-Down Mode Featuring Low CMOS Standby

Power Dissipation with 100 Cycle Recovery from Power-Down Condition

Low Power Dissipation in Idle Mode

INTEGRATION

ADSP-2100 Family Code Compatible, with Instruction Set Extensions

80K Bytes of On-Chip RAM, Configured as

16K Words On-Chip Program Memory RAM and

16K Words On-Chip Data Memory RAM

Dual Purpose Program Memory for Both Instruction and Data Storage

Independent ALU, Multiplier/Accumulator and Barrel Shifter Computational Units

Two Independent Data Address Generators

Powerful Program Sequencer Provides

Zero Overhead Looping Conditional Instruction Execution

Programmable 16-Bit Interval Timer with Prescaler

100-Lead TQFP

SYSTEM INTERFACE

16-Bit Internal DMA Port for High Speed Access to On-Chip Memory (Mode Selectable)

4 MByte Byte Memory Interface for Storage of Data Tables & Program Overlays

8-Bit DMA to Byte Memory for Transparent Program and Data Memory Transfers (Mode Selectable)

I/O Memory Interface with 2048 Locations Supports Parallel Peripherals (Mode Selectable)

Programmable Memory Strobe & Separate I/O Memory Space Permits “Glueless” System Design (Mode Selectable)

Programmable Wait State Generation

Two Double-Buffered Serial Ports with Companding Hardware and Automatic Data Buffering

Automatic Booting of On-Chip Program Memory from Byte-Wide External Memory, e.g., EPROM, or Through Internal DMA Port

Six External Interrupts

13 Programmable Flag Pins Provide Flexible System Signaling

UART Emulation through Software SPORT Reconfiguration

ICE-Port?* Emulator Interface Supports Debugging in Final Systems