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ADSP-2185M:  16-bit, 75 MIPS, 2.5v, 2 serial ports, host port, 80 KB RAM

Product Details

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

The ADSP-2185M 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-2185M 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-2185M is available in 100- pin LQFP package.


  • 13.3 ns Instruction Cycle Time @ 2.5 V (Internal), 75 MIPS Sustained Performance
  • Single-Cycle Instruction Execution
  • 3-Bus Architecture Allows Dual Operand Fetches in Every Instruction Cycle
  • ADSP-2100 Family Code Compatible (Easy to Use Algebraic Syntax), with Instruction Set Extensions
  • Single-Cycle Context Switch
  • 80K Bytes of On-Chip RAM, Configured as 16K Words Program Memory RAM and 16K Words Data Memory RAM
  • Dual-Purpose Program Memory for Both Instruction and Data Storage
  • Independent ALU, Multiplier/Accumulator, and Barrel Shifter Computational Units

Functional Block Diagram


Title Content Type File Type
ADSP-2185M: 16-bit, 75 MIPS, 2.5v, 2 serial ports, host port, 80 KB RAM Data Sheet  (Rev 0, 10/2000) (pdf, 289 kB) Data Sheets PDF
AN-227: Digital Control System Design with the ADSP-2100 Family  (pdf) Application Notes PDF
EE-32: Language Extensions: Memory Storage Types, ASM & Inline Constructs  (pdf, 89 kB) Application Notes PDF
AN-334: Digital Signal Processing Techniques  (pdf, 982 kB) Application Notes PDF
EE-249: Implementing Software Overlays on ADSP-218x DSPs with VisualDSP++  (pdf, 60 kB) Application Notes PDF
AN-524: ADV601/ADV611 Bin Width Calculation in ADSP-21xx DSP  (pdf, 84 kB) Application Notes PDF
EE-168: Using Third Overtone Crystals with the ADSP-218x DSP  (pdf, 838 kB) Application Notes PDF
EE-146: Implementing a Boot Manager for ADSP-218x Family DSPs  (pdf, 306 kB) Application Notes PDF
EE-37: How to Interface an LCD to the 21xx and 2106x Family DSP's  (pdf, 19 kB) Application Notes PDF
EE-142: Autobuffering, C and FFTs on the ADSP-218x  (pdf, 151 kB) Application Notes PDF
EE-133: Converting From Legacy Architecture Files To Linker Description Files for the ADSP-218x  (pdf, 267 kB) Application Notes PDF
EE-125: ADSP-218x Embedded System Software Management and In-System-Programming (ISP)  (pdf, 33 kB) Application Notes PDF
EE-102: Mode D and ADSP-218x Pin Compatibility - the FAQs  (pdf, 194 kB) Application Notes PDF
EE-96: Interfacing Two AD73311 Codecs to the ADSP-218x  (pdf, 203 kB) Application Notes PDF
EE-90: Using the 21xx C-FFT Library  (pdf, 204 kB) Application Notes PDF
EE-79: EPROM Booting In Host Mode with 100 Pin 218x Processors  (pdf, 241 kB) Application Notes PDF
EE-78: BDMA Usage on 100 pin ADSP-218x DSPs Configured for IDMA Use  (pdf, 160 kB) Application Notes PDF
EE-74: Analog Devices Serial Port Development and Troubleshooting Guide  (pdf, 343 kB) Application Notes PDF
EE-64: Setting Mode Pins on Reset  (pdf, 119 kB) Application Notes PDF
EE-60: Simulating an RS-232 UART Using the Synchronous Serial Ports on the ADSP-21xx Family DSPs  (pdf, 257 kB) Application Notes PDF
EE-48: Converting Legacy 21xx Systems To A 218x System Design  (pdf, 266 kB) Application Notes PDF
EE-39: Interfacing 5V Flash Memory to an ADSP-218x (Byte Programming Algorithm)  (pdf, 52 kB) Application Notes PDF
EE-36: ADSP-21xx Interface to the IOM-2 bus  (pdf, 46 kB) Application Notes PDF
EE-33: Programming The ADSP-21xx Timer In C  (pdf, 0 kB) Application Notes PDF
EE-18: Choosing and Using FFTs for ADSP-21xx  (pdf, 16 kB) Application Notes PDF
EE-12: Interrupts and Programmable Flags on the ADSP-2185/2186  (pdf, 12 kB) Application Notes PDF
EE-06: ADSP-21xx Serial Port Startup Issues  (pdf, 8 kB) Application Notes PDF
EE-5: ADSP-218x Full Memory Mode vs. Host Memory Mode  (pdf, 134 kB) Application Notes PDF
EE-2: Using ADSP-218x I/O Space  (pdf, 170 kB) Application Notes PDF
AN-227:  Digital Control System Design with the ADSP-2100 Family  (pdf, 671 kB) Application Notes PDF
Using the ADSP-2100 Family Volume 2 (Rev 1.0)  (zip, 2219 kB) | Request a CD Processor Manuals ZIP
VisualDSP++ 3.5 C Compiler and Library Manual for ADSP-218x DSPs, (Rev. 4.1, October 2003)  (pdf, 4912 kB) Software Manuals PDF
VisualDSP++ 5.0 Loader and Utilities Manual (Revision 2.5, January 2011)  (pdf, 2246 kB) Software Manuals PDF
ADSP-218X Family EZ-ICE Hardware Installation Guide (Rev 1.0, 2000)  (pdf, 113 kB) Legacy Emulator Manuals PDF
For Efficient Signal Processing in Embedded Systems, Take a DSP, not a RISC
(Analog Dialogue, Vol. 30, No. 3, 1996)
Analog Dialogue HTML
ADSP-2185M Anomaly List for Revision 2.1  (pdf) IC Anomalies PDF
Industrial ICs
Industrial ICs Solutions Bulletin, Volume 10, Issue 8
Solutions Bulletins HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADSP-218xM IBIS Datafile (LQFP Package)  (txt)
[IBIS Ver]2.1, [File Rev]2.0, [Date] 11/05/01
VisualDSP++ Downloads and Updates Software Tools Upgrades HTML
ADSP-218x Application Code Examples Code Examples HTML

SampleSample & Buy

Price, packaging, availability

ADSP-2185M Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADSP-2185MBSTZ-266 Status: Production 100 ld LQFP 100 Ind Tray, 90 $14.53 $12.64 Y  Material Info PCN Purchase
ADSP-2185MKCAZ-300 Status: Production CHIP SCALE BGA 144 Comm. Tray, 184 $17.06 $15.17 Y  Material Info PCN Purchase
ADSP-2185MKSTZ-300 Status: Production 100 ld LQFP 100 Comm. Tray, 90 $14.53 $12.64 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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