ADSP-2184BST-160 Просмотр технического описания (PDF) - Analog Devices

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ADSP-2184BST-160

DSP Microcomputer

Analog Devices 

ADSP-2184

The ADSP-21xx family DSPs contain a shadow bank register

that is useful for single cycle context switching of the processor.

The ADSP-2184’s flexible architecture and comprehensive

instruction set allow the processor to perform multiple opera-

tions in parallel. In one processor cycle the ADSP-2184 can:

• Generate the next program address

• Fetch the next instruction

• Perform one or two data moves

• Update one or two data address pointers

• Perform a computational operation

This takes place while the processor continues to:

• Receive and transmit data through the two serial ports

• Receive or transmit data through the internal DMA port

• Receive or transmit data through the byte DMA port

• Decrement timer

Development System

The ADSP-2100 Family Development Software, a complete set

of tools for software and hardware system development, sup-

ports the ADSP-2184. The System Builder provides a high level

method for defining the architecture of systems under develop-

ment. The Assembler has an algebraic syntax that is easy to

program and debug. The Linker combines object files into an

executable file. The Simulator provides an interactive instruction-

level simulation with a reconfigurable user interface to display

different portions of the hardware environment. A PROM

Splitter generates PROM programmer compatible files. The

C Compiler, based on the Free Software Foundation’s GNU

C Compiler, generates ADSP-2184 assembly source code.

The source code debugger allows programs to be corrected in

the C environment. The Runtime Library includes over 100

ANSI-standard mathematical and DSP-specific functions.

The EZ-KIT Lite is a hardware/software kit offering a complete

development environment for the entire ADSP-21xx family: an

ADSP-218x based evaluation board with PC monitor software

plus Assembler, Linker, Simulator and PROM Splitter software.

The ADSP-21xx EZ-KIT Lite is a low cost, easy to use hardware

platform on which you can quickly get started with your DSP soft-

ware design. The EZ-KIT Lite includes the following features:

• 33 MHz ADSP-2181

• Full 16-bit Stereo Audio I/O with AD1847 SoundPort®

Codec

• RS-232 Interface to PC with Microsoft Windows® 3.1

Control Software

• EZ-ICE® Connector for Emulator Control

• DSP Demo Programs

The ADSP-218x EZ-ICE Emulator aids in the hardware debug-

ging of an ADSP-2184 system. The emulator consists of hard-

ware, host computer resident software, and the target board

connector. The ADSP-2184 integrates on-chip emulation sup-

port with a 14-pin ICE-Port interface. This interface provides a

simpler target board connection that requires fewer mechanical

clearance considerations than other ADSP-2100 Family EZ-

ICEs. The ADSP-2184 device need not be removed from the

target system when using the EZ-ICE, nor are any adapters

needed. Due to the small footprint of the EZ-ICE connector,

emulation can be supported in final board designs.

SoundPort and EZ-ICE are registered trademarks of Analog Devices, Inc.

Windows is a registered trademark of Microsoft Corporation.

The EZ-ICE performs a full range of functions, including:

• In-target operation

• Up to 20 breakpoints

• Single-step or full-speed operation

• Registers and memory values can be examined and altered

• PC upload and download functions

• Instruction-level emulation of program booting and execution

• Complete assembly and disassembly of instructions

• C source-level debugging

See Designing An EZ-ICE-Compatible Target System in the

ADSP-2100 Family EZ-Tools Manual (ADSP-2181 sections), as

well as the Target Board Connector for EZ-ICE Probe section

of this data sheet, for the exact specifications of the EZ-ICE

target board connector.

Additional Information

This data sheet provides a general overview of ADSP-2184

functionality. For additional information on the architecture and

instruction set of the processor, refer to the ADSP-2100 Family

User’s Manual, Third Edition. For more information about the

development tools, refer to the ADSP-2100 Family Development

Tools Data Sheet.

ARCHITECTURE OVERVIEW

The ADSP-2184 instruction set provides flexible data moves

and multifunction (one or two data moves with a computation)

instructions. Every instruction can be executed in a single pro-

cessor cycle. The ADSP-2184 assembly language uses an alge-

braic syntax for ease of coding and readability. A comprehensive

set of development tools supports program development.

DATA ADDRESS

GENERATORS PROGRAM

SEQUENCER

DAG 1 DAG 2

POWER-DOWN

CONTROL

MEMORY

4K ؋ 24 4K ؋ 16

PROGRAM DATA

MEMORY MEMORY

PROGRAM MEMORY ADDRESS

DATA MEMORY ADDRESS

PROGRAM MEMORY DATA

DATA MEMORY DATA

ARITHMETIC UNITS

ALU MAC SHIFTER

ADSP-2100 BASE

ARCHITECTURE

SERIAL PORTS

SPORT 0 SPORT 1

PROGRAMMABLE

I/O

AND

FLAGS

FULL MEMORY

MODE

EXTERNAL

ADDRESS

BUS

EXTERNAL

DATA

BUS

BYTE DMA

CONTROLLER

TIMER

OR

EXTERNAL

DATA

BUS

INTERNAL

DMA

PORT

HOST MODE

Figure 1. Block Diagram

Figure 1 is an overall block diagram of the ADSP-2184. The

processor contains three independent computational units: the

ALU, the multiplier/accumulator (MAC) and the shifter. The

computational units process 16-bit data directly and have provi-

sions to support multiprecision computations. The ALU per-

forms a standard set of arithmetic and logic operations; division

primitives are also supported. The MAC performs single-cycle

multiply, multiply/add and multiply/subtract operations with

40 bits of accumulation. The shifter performs logical and arith-

metic shifts, normalization, denormalization and derive expo-

nent operations.

The shifter can be used to efficiently implement numeric

format control including multiword and block floating-point

representations.

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