STMicroelectronics DSM2190F4V-15T6

Overview

DSM2190F4V-15T6 from STMicroelectronics is a Digital Signal Processor System Memory (DSM) device designed for seamless glueless integration with Analog Devices ADSP-2191 DSPs. It integrates dual Flash memory (256K×8 main + 32K×8 secondary), a 16-macrocell CPLD (>3,000 gates), up to 16 multifunction I/O pins, and JTAG-based in-system programming - all operating at 3.3V ±10% with 150 ns access time, supporting boot code execution, data logging, and real-time code swapping in embedded DSP systems.

For engineers reviewing the DSM2190F4V-15T6 datasheet, DSM2190F4V-15T6 pinout, DSM2190F4V-15T6 application, or DSM2190F4V-15T6 equivalent, key selection criteria include concurrent Flash read/erase capability, sector-level write protection, runtime PLD reconfiguration via DSP bus, zero-power standby current (25 µA), and PQFP52 package compatibility with ADSP-2191 external port timing.

Technical Context

The DSM2190F4V-15T6 implements a two-chip DSP system architecture where the ADSP-2191 directly controls all DSM resources via its 22-bit address bus, 8-bit data bus, and BMS/IOMS/MSx strobes - enabling runtime access without glue logic. Its Decode PLD (DPLD) dynamically maps Flash sectors to any address boundary, while the Complex PLD (CPLD) provides 16 macrocells with direct DSP bus access for real-time peripheral control.

Flash operation supports true concurrency: the DSP can read from Main Flash while erasing or programming Secondary Flash, with independent sector protection and 100K erase cycles. Power management includes automatic zero-power standby between accesses, and security is enforced via a programmable bit that blocks external JTAG access while preserving DSP read access to Flash contents.

Key Specifications

Pinout & Package

DSM2190F4V-15T6 is housed in a 52-pin Plastic Quad Flat Pack (PQFP) package with 0.65 mm lead pitch, compliant with JEDEC MS-026. Pin functions are defined for direct interfacing with ADSP-2191's external port, including dedicated address/data/control lines, I/O ports (B/C/D), JTAG ISP signals, and power/ground.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DSP system memory applications.

Compared with DSM2190F4V-15T6, the PLCC variant offers identical functionality in a different package, while the ISPLSI2032VE demands external memory and custom interface design - making DSM2190F4V-15T6 uniquely suited for compact, low-risk ADSP-2191 system integration.

Availability

DSM2190F4V-15T6 is available at Aetrix Electronics and suitable for industrial motor control, portable medical instrumentation, automotive diagnostic tools, and communications baseband processing requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for DSM2190F4V-15T6 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

STMicroelectronics is a global semiconductor leader specializing in microcontrollers, analog ICs, and system-on-chip solutions for industrial, automotive, and consumer markets.

The DSM product line was developed specifically to simplify ADSP-2191-based DSP system design by integrating Flash memory, programmable logic, and intelligent memory mapping - targeting cost-sensitive, space-constrained embedded applications.

FAQ

Does DSM2190F4V-15T6 support concurrent read and erase operations across its two Flash arrays?

Yes. The device allows the ADSP-2191 to read from the 256K×8 Main Flash while simultaneously erasing or programming the 32K×8 Secondary Flash. This concurrency is hardware-enforced and does not require special DSP core intervention - it relies on independent Flash array controllers and separate address decode paths managed by the DPLD.

How is security implemented, and does it block DSP access to Flash contents?

Security is enforced via a programmable bit that disables external JTAG access to Flash and PLD configuration. Crucially, the ADSP-2191 retains full read access to Flash memory contents via its 8-bit data bus even when the security bit is set - ensuring runtime firmware execution remains unaffected while preventing unauthorized external extraction.

Can the CPLD logic be modified during DSP runtime without halting program execution?

Yes. CPLD macrocell registers are memory-mapped to the DSM's 256-byte control register space and accessible via standard ADSP-2191 read/write instructions. This allows dynamic reconfiguration - such as updating a counter preset or changing state machine behavior - without interrupting the DSP's main algorithm flow or requiring a reset.

What is the role of the Page Register, and how does it affect Flash memory mapping?

The Page Register is an 8-bit control register that selects which 64KB page of the 22-bit address space is active for Flash access. Combined with the DPLD, it enables flexible bank-switching - allowing the DSP to map different Flash sectors (e.g., boot code vs. data log) into overlapping or non-contiguous address regions without hardware redesign or memory remapping overhead.