STMicroelectronics DSM2180F3V-15T6

Overview

DSM2180F3V-15T6 from Lattice Semiconductor is a programmable DSP system memory IC designed for seamless integration with Analog Devices ADSP-218X family DSPs. It integrates 128 KB (1 Mbit × 8) Flash memory, a 3,000-gate CPLD with 16 macrocells, up to 16 configurable I/O pins, and JTAG in-system programming - all operating at 5 V ±10% with 90 ns access time in PQFP52 package. It enables glueless bootloading via Byte DMA and external data overlay memory access for firmware updates.

For engineers reviewing the DSM2180F3V-15T6 datasheet, DSM2180F3V-15T6 pinout, DSM2180F3V-15T6 application, or DSM2180F3V-15T6 equivalent, key selection criteria include BDMA vs. DMS memory access modes, sector-erase capability (eight 16 KB sectors), PLD runtime configurability via csiop registers, and zero-power standby current of 75 µA - critical for battery-powered ADSP-218X-based embedded systems.

Technical Context

The DSM2180F3V-15T6 implements a dual-PLD architecture: a Decode PLD (DPLD) for Flash sector selection and chip enable generation, and a Complex PLD (CPLD) with 16 input/output macrocells directly accessible by the DSP data bus. Its memory interface supports both Byte DMA (BMS strobe) for bootloading and Data Memory Overlay (DMS strobe) for efficient byte-wise Flash writes without BDMA channel reinitialization.

Runtime control is managed through a 256-byte csiop register space mapped to I/O memory using IOMS, including an 8-bit Page Register that dynamically redirects Flash address decoding. Power management enables automatic Turbo/Non-Turbo PLD mode switching and zero-power standby between accesses - confirmed by 75 µA ICCQ at VCC = 5 V.

Key Specifications

Pinout & Package

DSM2180F3V-15T6 is housed in a 52-pin Plastic Quad Flatpack (PQFP52) package, measuring 10 mm × 10 mm × 1.7 mm, with 0.65 mm lead pitch and Pb-free finish compliant with JEDEC MS-026.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DSM2180F3-90, the DSM2180F3V-15T6 offers SMT-compatible PQFP packaging and verified 150 ns timing margin for robust operation at 25 °C–70 °C industrial range; versus ISPLSI2032VE-135LQ, it delivers turnkey DSP memory+logic integration without external components or voltage translation.

Availability

DSM2180F3V-15T6 is available at Aetrix Electronics and suitable for portable audio analyzers, industrial keypad controllers, and battery-powered sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for DSM2180F3V-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

Lattice Semiconductor is a fabless provider of low-power programmable logic devices, specializing in FPGA, CPLD, and programmable mixed-signal solutions for edge computing and embedded control.

The DSM (Digital Signal Processor System Memory) product line was engineered specifically to eliminate glue logic in ADSP-218X-based systems by integrating Flash, PLD, and intelligent memory mapping - targeting cost-sensitive, size-constrained DSP applications in medical and industrial markets.

FAQ

Does DSM2180F3V-15T6 support ADSP-2186 in full memory mode?

Yes. The device decodes all 22 ADSP-2186 address lines (AD0–AD15 + PA0–PA7) and supports full memory mode operation using BMS, DMS, and IOMS strobes. Its 128 KB Flash is mapped into the DSP's external data memory space, and the Page Register enables dynamic relocation of Flash sectors across the 4 MB address range - confirmed in Section 7 of the datasheet.

Can the CPLD logic be modified after soldering without JTAG?

No. CPLD configuration is stored in nonvolatile memory and can only be updated via JTAG ISP interface. Runtime register writes affect only macrocell output states (e.g., OMC flip-flop values), not the underlying PLD logic equations or interconnect - the architecture separates configuration (JTAG-only) from operational control (csiop registers).

What is the minimum erase cycle endurance for Flash sectors?

Each 16 KB Flash sector supports ≥100,000 erase cycles with 15-year data retention at 25 °C, as specified in Table on page 55 of the datasheet. Sector-level erasure allows firmware updates to overwrite only modified modules - preserving calibration data in protected sectors during application upgrades.

How does the security bit affect DSP runtime access to Flash?

The security bit blocks JTAG access to Flash and PLD configuration but does not restrict the DSP's ability to read Flash contents via PA0–PA7 data bus using BMS or DMS strobes. The DSP retains full read access to boot code and overlay data - enabling secure field deployment while maintaining functional operation, as detailed in Section 6.