ADSP-2185
Fabricated in a high speed, double metal, low power, 0.5
µm
CMOS process, the ADSP-2185 operates with a 30 ns instruc-
tion cycle time. Every instruction can execute in a single proces-
sor cycle.
The ADSP-2185’s flexible architecture and comprehensive
instruction set allow the processor to perform multiple opera-
tions in parallel. In one processor cycle the ADSP-2185 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
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
This takes place while the processor continues to:
• receive and transmit data through the two serial ports
• receive and/or transmit data through the internal DMA port
• receive and/or transmit data through the byte DMA port
• decrement timer
Development System
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 sec-
tion of this data sheet for the exact specifications of the EZ-ICE
®
*
target board connector.
Additional Information
The ADSP-2100 Family Development Software, a complete set
of tools for software and hardware system development, sup-
ports the ADSP-2185. 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-2185 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 hard-
ware platform on which you can quickly get started with your
DSP software 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 Windows
®
3.1 Control Software
• Stand-Alone Operation with Socketed EPROM
• EZ-ICE
®*
Connector for Emulator Control
• DSP Demo Programs
The ADSP-218x EZ-ICE
®
* Emulator aids in the hardware
debugging of an ADSP-2185 system. The emulator consists of
hardware, host computer resident software, and the target board
connector. The ADSP-2185 integrates on-chip emulation sup-
port with a 14-pin ICE-PORT™* interface. This interface pro-
vides a simpler target board connection that requires fewer
mechanical clearance considerations than other ADSP-2100
Family EZ-ICE
®
*s. The ADSP-2185 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.
*All trademarks are the property of their respective holders.
*EZ-ICE and SoundPORT are registered trademarks of Analog Devices, Inc.
This data sheet provides a general overview of ADSP-2185
functionality. For additional information on the architecture and
instruction set of the processor, refer to the
ADSP-2100 Family
User’s Manual.
For more information about the development
tools, refer to the
ADSP-2100 Family Development Tools Data
Sheet.
ARCHITECTURE OVERVIEW
The ADSP-2185 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-2185 assembly language uses an alge-
braic syntax for ease of coding and readability. A comprehensive
set of development tools supports program development.
POWER-DOWN
CONTROL
DATA ADDRESS
GENERATORS
DAG 1 DAG 2
MEMORY
PROGRAM
SEQUENCER
16k 24
PROGRAM
MEMORY
16k 16
DATA
MEMORY
PROGRAMMABLE
I/O
AND
FLAGS
FULL MEMORY
MODE
EXTERNAL
ADDRESS
BUS
EXTERNAL
DATA
BUS
BYTE DMA
CONTROLLER
PROGRAM MEMORY ADDRESS
DATA MEMORY ADDRESS
PROGRAM MEMORY DATA
OR
DATA MEMORY DATA
EXTERNAL
DATA
BUS
ARITHMETIC UNITS
ALU
MAC
SHIFTER
SERIAL PORTS
SPORT 0
SPORT 1
TIMER
INTERNAL
DMA
PORT
HOST MODE
ADSP-2100 BASE
ARCHITECTURE
Figure 1. Block Diagram
Figure 1 is an overall block diagram of the ADSP-2185. 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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