Analog Devices Inc. ADSP-2191MBSTZ-140

Overview

ADSP-2191MBSTZ-140 from Analog Devices is a 160 MIPS fixed-point DSP microcomputer with dual-memory architecture (32K × 24-bit program RAM + 32K × 16-bit data RAM), three full-duplex serial ports, two SPI-compatible ports, UART, 16-bit host port with DMA, and three programmable timers - deployed in telecom infrastructure, audio processing, and real-time control systems.

For engineers reviewing the ADSP-2191MBSTZ-140 datasheet, ADSP-2191MBSTZ-140 pinout, ADSP-2191MBSTZ-140 application, or ADSP-2191MBSTZ-140 equivalent, key selection criteria include instruction cycle time (6.25 ns), on-chip memory configuration, serial interface count and TDM channel support (up to 128), host port width (8/16-bit), and power supply requirements (2.5 V core / 3.3 V I/O).

Technical Context

The ADSP-2191MBSTZ-140 implements a pipelined Harvard architecture with three independent computational units (ALU, MAC, barrel shifter), dual 40-bit accumulators, and two 16-bit DAGs supporting modulo addressing for circular buffers. Its unified memory space enables simultaneous instruction and data fetches via separate PM and DM buses.

It integrates a 16-bit external memory interface (22-bit address, up to 16M words), IEEE 1149.1 JTAG debug port, programmable PLL (1×–32× multiplication), and flexible interrupt controller supporting 17 total interrupts with nested priority levels - all operating at 160 MIPS sustained performance with zero-overhead looping.

Key Specifications

Pinout & Package

ADSP-2191MBSTZ-140 is housed in a 144-lead Low-Profile Quad Flat Package (LQFP) with 0.5 mm lead pitch and exposed thermal pad. Pin functions are defined per Analog Devices' official 144-Lead LQFP Pinout diagram (Rev. A, p.43).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADSP-2191MBSTZ-140, the ADSP-2191MKSTZ-140 offers identical functionality in a smaller footprint but demands BGA rework capability, while the TMS320VC549PGE trades integrated peripherals and 60% higher throughput for lower unit cost and mature ecosystem support - making it viable only where serial interface count and 160 MIPS are non-critical.

Availability

ADSP-2191MBSTZ-140 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motor control, professional audio, medical imaging, and embedded test equipment requiring stable component supply and long-term production continuity.

Supply support for ADSP-2191MBSTZ-140 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 digital signal processing semiconductors, headquartered in Norwood, MA.

The ADSP-219x family was designed specifically for computationally intensive, low-latency embedded signal processing - targeting telecom, audio, and industrial control applications where code efficiency, peripheral integration, and deterministic timing are critical.

FAQ

What is the maximum operating frequency of the ADSP-2191MBSTZ-140?

The ADSP-2191MBSTZ-140 operates at a 6.25 ns instruction cycle time, corresponding to a maximum sustained throughput of 160 million instructions per second (MIPS). This performance is achieved using an internal PLL that multiplies an external clock input (1–40 MHz) by factors from 1× to 32×. The device does not specify a maximum input clock frequency beyond the PLL range, and its timing is validated under 2.5 V core voltage and commercial temperature conditions.

Does the ADSP-2191MBSTZ-140 support booting from external SPI flash?

Yes, the ADSP-2191MBSTZ-140 supports autobaud UART, 8/16-bit host, and SPI ROM boot modes via its on-chip boot ROM. When configured for SPI boot, the device initializes SPORT2 as an SPI master interface (SCK1/MOSI1/MISO1) to load executable code directly from external SPI flash into internal RAM. Boot mode selection is controlled by the BMODE1–0 pins at reset, and no external boot controller is required.

How many DMA channels does the ADSP-2191MBSTZ-140 support simultaneously?

The ADSP-2191MBSTZ-140 supports up to 11 DMA channels active concurrently - allocated across its integrated peripherals: 3 SPORTs (receive/transmit), 2 SPI ports (receive/transmit), 1 UART (receive/transmit), 1 host port, and 1 memory-to-memory channel. Channel arbitration follows fixed priority (SPORT0 receive highest), and each channel uses dedicated descriptor registers to define source/destination addresses, transfer count, and auto-reload behavior - enabling complex multi-peripheral data flows without CPU intervention.

Can the ADSP-2191MBSTZ-140 execute C code efficiently?

Yes, the ADSP-2191MBSTZ-140 includes architectural enhancements over the ADSP-218x family specifically to improve compiled C and C++ code efficiency - including expanded register sets, optimized addressing modes for array access, and instruction set extensions that reduce function call overhead. Analog Devices' VisualDSP++ toolchain provides ANSI C compliance, inline assembly support, and profiling tools validated for this part, enabling production-grade firmware development without assembly-only constraints.

What is the purpose of the PF0–PF7 pins on the ADSP-2191MBSTZ-140?

The PF0–PF7 pins on the ADSP-2191MBSTZ-140 are programmable flag I/Os that serve three roles: general-purpose bidirectional GPIO, hardware interrupt inputs (configurable for level- or edge-sensitive triggering), and software-controllable status outputs. Six of these pins (PF0–PF5) can be mapped to internal condition signals (e.g., timer overflow, DMA completion), enabling efficient event-driven programming without polling - a key feature used in real-time control loops within ADSP-2191MBSTZ-140-based systems.