Analog Devices Inc. ADSP-2186KST-133

Overview

ADSP-2186KST-133 from Analog Devices is a 40 MIPS fixed-point DSP microcomputer with 8K × 24-bit on-chip program RAM, 8K × 16-bit on-chip data RAM, and dual synchronous serial ports (SPORT0/SPORT1). It executes instructions in 25 ns single cycles, supports zero-overhead looping, and integrates power-down, idle, and slow-idle low-power modes for portable audio and telecom terminal applications.

For engineers reviewing the ADSP-2186KST-133 datasheet, ADSP-2186KST-133 pinout, ADSP-2186KST-133 application, or ADSP-2186KST-133 equivalent, key selection criteria include instruction cycle time, on-chip memory configuration, serial port framing flexibility, power-down recovery latency, and LQFP-100 package compatibility with ICE-Port™ emulation support.

Technical Context

The ADSP-2186KST-133 implements the ADSP-2100 base architecture with three independent computational units (ALU, MAC, shifter), two data address generators (DAG1/DAG2), and a zero-overhead program sequencer. Its 3-bus architecture enables simultaneous dual operand fetches-one from program memory and one from data memory-within each 25 ns instruction cycle.

It supports full-memory mode (14-bit address bus, 24-bit data bus) or host mode (16-bit IDMA port), with programmable wait states, byte DMA to 4 MB external memory, and I/O memory space with 2048 locations. Serial ports offer hardware A-law/µ-law companding per CCITT G.711 and configurable frame sync polarity/timing.

Key Specifications

Pinout & Package

The ADSP-2186KST-133 is housed in a 100-lead LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functionality is multiplexed: external bus signals (A13:0, D23:0) are active only in Full Memory Mode (Mode C = 0); IDMA signals (IAD15:0, IWR, IRD) activate in Host Mode (Mode C = 1). Serial port and flag pins retain concurrent interrupt/IO capability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-2186KST-133, ADSP-2189MSTZ-120 trades external memory flexibility for integrated audio I/O and speed, while TMS320C549PGE sacrifices on-chip program memory and debug simplicity for raw MIPS and industry-standard tooling-making ADSP-2186KST-133 optimal for self-contained, low-power, field-debuggable embedded DSP designs.

Availability

ADSP-2186KST-133 is available at Aetrix Electronics and suitable for voice band modem design, digital audio terminal development, industrial sensor signal processing, and telecom line card controller applications requiring stable component supply across extended product lifecycles.

Supply support for ADSP-2186KST-133 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, Inc. is a global leader in high-performance analog, mixed-signal, and DSP technology, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.

The ADSP-2186KST-133 belongs to the ADSP-2100 family of fixed-point DSP microcomputers, engineered specifically for real-time embedded signal processing in portable, battery-powered, and telecom infrastructure systems where deterministic latency and low standby power are critical.

FAQ

What clock sources does the ADSP-2186KST-133 support?

The ADSP-2186KST-133 accepts either a 40 MHz crystal oscillator connected across CLKIN/XTAL pins or an external TTL/CMOS clock signal applied to CLKIN. The device operates at a fixed 25 ns instruction cycle time (40 MHz core clock), and CLKOUT can be disabled via the SPORT0 autobuffer control register to reduce system power. Crystal operation supports automatic oscillator startup stabilization with ~4096-cycle delay before full-speed execution resumes after power-down.

Does the ADSP-2186KST-133 support in-circuit debugging without board redesign?

Yes, the ADSP-2186KST-133 integrates on-chip ICE-Port™ emulation support accessible through its dedicated 9-pin EZ-Port interface. This allows full instruction-level debugging-including breakpoints, register/memory inspection, and C-source stepping-in the final target system without removing the ADSP-2186KST-133 from the board or adding trace headers. No mechanical clearance adaptations or PCB layout changes are required beyond routing the EZ-Port signals to a standard 14-pin IDC connector.

How does the ADSP-2186KST-133 handle external memory interfacing in Full Memory Mode?

In Full Memory Mode (Mode C = 0), the ADSP-2186KST-133 exposes 14 address lines (A13:0) and 24 data lines (D23:0), supporting up to 4 MB of byte-wide external memory via its Byte DMA port. Memory select signals (BMS, CMS, PMS, DMS, IOMS) and programmable wait-state generation enable direct "glueless" connection to slow EPROMs, SRAMs, or peripherals. The 8 MSBs of D23:0 double as byte memory address bits, allowing efficient access to external program overlays and data tables without CPU intervention.

Can the ADSP-2186KST-133 execute code from external memory?

No-the ADSP-2186KST-133 requires boot code to be loaded into its on-chip 8K × 24-bit program RAM. It supports automatic booting from byte-wide external memory (e.g., EPROM) via the Byte DMA port or from an external host through the Internal DMA port in Host Mode. Once booted, all program execution occurs from on-chip RAM; external memory serves only for data storage, overlays, or coefficient tables-not for direct instruction fetch.

What are the power management capabilities of the ADSP-2186KST-133?

The ADSP-2186KST-133 offers three hardware-controlled low-power states: Power-Down (≤200 CLKIN cycle recovery, nonmaskable interrupt wake-up), Idle (indefinite wait until unmasked interrupt), and Slow Idle (IDLE(n) with programmable clock divisor 16/32/64/128). The PWD pin and software power-down force bit initiate Power-Down; PWDACK confirms entry. CLKOUT disable and PF2 reconfiguration further reduce leakage current during battery operation-enabling multi-week standby in portable voice terminals.