概述

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

The ADSP-2185 combines the ADSP-2100 family base architecture (three computational units, data address generators and a program sequencer) with two serial ports, a 16-bit internal DMA port, a byte DMA port, a programmable timer, Flag I/O, extensive interrupt capabilities and on-chip program and data memory.

The ADSP-2185 integrates 80K bytes of on-chip memory configured as 16K words (24-bit) of program RAM and 16K words (16-bit) of data RAM. Power-down circuitry is also provided to meet the low power needs of battery operated portable equipment. The ADSP-2185 is available in 100-pin LQFP package.

In addition, the ADSP-2185 supports new instructions, which include bit manipulations- bit set, bit clear, bit toggle, bit test- new ALU constants, new multiplication instruction (x squared), biased rounding, result free ALU operations, I/O memory transfers and global interrupt masking, for increased flexibility.

特点

30 ns Instruction Cycle Time 33 MIPS Sustained Performance

Single-Cycle Instruction Execution

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

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)