Analog Devices Inc. ADSP-2189MKST-300

Overview

ADSP-2189MKST-300 from Analog Devices is a 75 MIPS fixed-point DSP microcomputer built on the ADSP-2100 architecture, featuring 32K × 24-bit on-chip program RAM, 48K × 16-bit on-chip data RAM, dual synchronous serial ports (SPORT0/SPORT1), and a 16-bit internal DMA port. It operates at 13.3 ns instruction cycle time (75 MHz equivalent) with full power-down, idle, and slow-idle low-power modes, targeting real-time audio processing, telecom signal conditioning, and embedded control systems.

For engineers reviewing the ADSP-2189MKST-300 datasheet, ADSP-2189MKST-300 pinout, ADSP-2189MKST-300 application, or ADSP-2189MKST-300 equivalent, key selection criteria include on-chip memory configuration (32K/48K split), LQFP-100 package compatibility, SPORT companding support (A-law/µ-law per G.711), 200-cycle power-down recovery, and ICE-Port™ debug interface integration.

Technical Context

The ADSP-2189MKST-300 implements a three-bus Harvard architecture with independent ALU, MAC, and shifter units enabling single-cycle dual operand fetches and zero-overhead looping. Its program sequencer supports conditional execution and subroutine calls in one cycle, while two DAGs manage circular buffer addressing with modulo arithmetic for efficient FIR/IIR filtering.

It integrates dual double-buffered serial ports supporting frame-synchronized or frameless operation, hardware companding, and programmable clock generation; the 16-bit IDMA port enables transparent access to on-chip RAM, and the byte DMA port supports up to 4 MB external byte-wide memory for program overlays and data tables.

Key Specifications

Pinout & Package

ADSP-2189MKST-300 is housed in a 100-lead LQFP package (14 mm × 14 mm, 0.5 mm pitch) with thermal pad. Pin functionality includes multiplexed serial port, flag, interrupt, and memory interface signals; mode pins (Mode A–D) configure Full Memory or Host Mode during reset only.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-point DSP microcomputer applications.

Compared with ADSP-2189MKST-300, the ADSP-2189MKBZ-300 offers identical functionality in a smaller BGA footprint but demands advanced assembly, while the TMS320VC549PGE delivers higher raw speed but lacks G.711 companding and requires firmware migration - making ADSP-2189MKST-300 optimal for cost-sensitive, voice-optimized LQFP designs.

Availability

ADSP-2189MKST-300 is available at Aetrix Electronics and suitable for audio signal processing, telecom voice channel equipment, and industrial motor control requiring stable component supply across long-lifecycle embedded programs.

Supply support for ADSP-2189MKST-300 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision, power, and connectivity applications.

The ADSP-21xx family was designed specifically for real-time embedded DSP tasks demanding deterministic low-latency execution, on-chip memory integration, and hardware-accelerated serial interfaces - targeting audio, telecom, and industrial control markets.

FAQ

What clock frequency does ADSP-2189MKST-300 require to achieve its rated 75 MIPS performance?

ADSP-2189MKST-300 requires a 37.5 MHz input clock on CLKIN (or a 37.5 MHz crystal across CLKIN/XTAL) to achieve its 13.3 ns instruction cycle time and sustained 75 MIPS throughput. The internal clock generator doubles this to 75 MHz for core operation, and CLKOUT reflects the 75 MHz instruction rate when enabled via the CLKODIS bit.

Does ADSP-2189MKST-300 support direct replacement of EPROM-based boot memory?

Yes, ADSP-2189MKST-300 supports automatic booting from byte-wide external memory such as EPROM via its Byte DMA port. During reset, it loads the initial program code from external byte memory into on-chip program RAM, eliminating need for external boot ROM in many configurations.

Can ADSP-2189MKST-300 operate with mixed 2.5 V and 3.3 V peripherals?

Yes, ADSP-2189MKST-300 uses separate VDDINT (2.5 V) for core logic and VDDEXT (2.5 V or 3.3 V) for I/O, with all inputs tolerant up to 3.6 V regardless of VDDEXT setting. This allows safe interfacing to both 2.5 V and 3.3 V peripherals without level shifters.

How does the power-down mode of ADSP-2189MKST-300 differ from idle mode?

ADSP-2189MKST-300 power-down mode halts the core clock and reduces supply current to microamps, with 200-cycle wake-up latency; idle mode maintains clock operation but disables instruction fetch until interrupt, offering faster response but higher current draw. Slow idle further divides the clock by 16/32/64/128 for intermediate power savings.

Is ICE-Port™ debugging supported on ADSP-2189MKST-300 without hardware modifications?

Yes, ADSP-2189MKST-300 integrates on-chip ICE-Port™ emulation support with a dedicated 9-pin EZ-Port interface. No target board changes or socket adapters are needed - the ADSP-2189MKST-300 remains in-circuit during full instruction-level debugging, register inspection, and memory alteration.