MCU, DSP or FPGA? Understand the Device Before Listing Surplus

An MCU typically runs control software, a DSP targets digital signal processing, and programmable logic can configure hardware datapaths. These roles overlap, so classify stock using the exact part and manufacturer documentation.

Start with how the device works

A microcontroller integrates a processing core, memory resources and peripherals for embedded control. A program can read inputs, update state and drive outputs. Timers, ADCs and communication interfaces are common, but their availability depends on the device. A digital signal processor focuses on numerical signal-processing tasks; the label is not a general synonym for a higher-value MCU.

What does FPGA programmability change?

FPGA programmable logic can form hardware functions and parallel datapaths. AMD describes logic that can implement accelerators, processors and peripherals. Configuring this hardware is different from executing software instructions on an MCU core. Some SoCs combine processor systems with programmable logic, so the presence of a CPU alone does not identify the product category.

DSP instructions do not automatically make a device a DSP

ST classifies the STM32F407VG as an MCU while documenting DSP instructions and a floating-point unit in its Cortex-M4 core. This is a useful example of why a supported function and a manufacturer product category should be recorded separately. Preserve the official category and full ordering code rather than turning a feature name into a stock identifier.

What should the seller record?

• MCUs: record known programming, board-mounting and protection status alongside the full part number; mark unknown details as unconfirmed.
• DSPs and processors: retain the exact series, package and lot. Do not infer clock speed or grade from appearance.
• FPGAs and SoCs: preserve speed, package and temperature suffixes, and distinguish loose devices from trays or original packs.

Illustrative example: three functions on one control board

A discontinued project might leave MCU, ADC and FPGA stock. Create separate list rows even when the parts belonged to the same board: they are not interchangeable materials. This is a classification example, not a customer transaction, test result or availability claim. Category names and label photos alone do not establish usability.

Manufacturer sources and scope

Prepared from these public sources, checked on 21 October 2026. Links explain the technology and do not imply manufacturer authorization or certification of ReclaimChips. Use the current documentation for the exact ordering code when deciding application, package or handling requirements.

• TI microcontrollers and processors
• ST STM32F407VG product information
• AMD UG1304: Programmable Logic

Prepare a stock list or sourcing request

List manufacturer, full ordering code, quantity, lot and condition separately. Submit surplus IC stock · Send a BOM sourcing request · Content maintenance notes.