NXP Semiconductors DSP56F805FV80

Overview

DSP56F805FV80 from NXP Semiconductors (formerly Freescale) is a 16-bit Digital Signal Controller integrating DSP and MCU functionality in a unified C-efficient architecture. It delivers up to 40 MIPS at 80 MHz core frequency, features dual 6-channel PWM modules with fault protection and dead-time insertion, two 12-bit ADCs with synchronization capability, and a CAN 2.0B interface - enabling real-time motor control in brushless DC and AC induction motor drives.

For engineers reviewing the DSP56F805FV80 datasheet, DSP56F805FV80 pinout, DSP56F805FV80 application, or DSP56F805FV80 equivalent, key selection considerations include its 144-pin LQFP package, 31.5 KB on-chip Program Flash, dual quadrature decoders for position feedback, JTAG/OnCE debug support, and hardware DO/REP loop acceleration for deterministic control loops.

Technical Context

The DSP56F805FV80 implements the 56800E core with dual-Harvard architecture, three parallel execution units, and a 16×16-bit MAC unit delivering 36-bit accumulation. Its PLL-based clock generator supports programmable core frequencies up to 80 MHz from an 8 MHz crystal input, with CLKO output configurable for XTAL or PLL-derived clocks.

Memory subsystem includes 31.5K × 16-bit Program Flash, 4K × 16-bit Data Flash, 512 × 16-bit Program RAM, and 2K × 16-bit Data RAM - all accessible via internal buses supporting simultaneous instruction and data fetches. External bus interface provides up to 64K × 16-bit program and data memory expansion with configurable wait states.

Key Specifications

Pinout & Package

Package: 144-pin LQFP (20 mm × 20 mm, 0.5 mm pitch), RoHS-compliant, with dedicated power/ground pins (8× VDD, 1× VDDA, 7× VSS, 1× VSSA, 2× VCAPC) and factory-reserved TCS tied to VSS.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital signal controller applications.

Compared with MPC5604B and TMS320F28027, the DSP56F805FV80 uniquely balances 16-bit efficiency, integrated motion peripherals (dual QDEC + 12 PWM), and CAN 2.0B in a mature, production-proven platform - making it optimal for cost-sensitive industrial motion systems requiring minimal external components.

Availability

DSP56F805FV80 is available at Aetrix Electronics and suitable for industrial motor drives, smart appliance inverters, and automotive body electronics requiring stable component supply across multi-year production cycles.

Supply support for DSP56F805FV80 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in microcontrollers and digital signal processing.

The DSP56F805FV80 belongs to the 56800E family - designed specifically for cost-sensitive, real-time motion control applications requiring tight integration of PWM, ADC, quadrature decoding, and CAN in a single chip.

FAQ

What is the maximum operating frequency of the DSP56F805FV80 core?

The DSP56F805FV80 core operates at up to 80 MHz, delivering 40 MIPS performance. This frequency is achieved via an on-chip PLL that multiplies an 8 MHz external crystal input. The CLKO pin can output either the XTAL signal or the PLL-derived master clock, selectable via the CLKOSEL register in the DSP56F805FV80.

Does the DSP56F805FV80 support simultaneous sampling across both ADC modules?

Yes, the DSP56F805FV80 supports hardware-synchronized simultaneous sampling on both 12-bit ADC modules (ADCA and ADCB). Each ADC has four dedicated analog inputs (ANA0–3 and ANA4–7), and their conversion triggers can be aligned to PWM events - enabling accurate current vector measurement in three-phase motor control applications using the DSP56F805FV80.

How many independent PWM channels does the DSP56F805FV80 provide?

The DSP56F805FV80 provides 12 independent PWM outputs: six from the PWMA module (PWMA0–5) and six from the PWMB module (PWMB0–5). Each module supports complementary pair generation with programmable dead time, fault shutdown inputs (FAULTA0–3, FAULTB0–3), and current-sense correction (ISA0–2, ISB0–2), all managed within the DSP56F805FV80's hardware PWM controllers.

Is the DSP56F805FV80 pin-compatible with other members of the 56F80x family?

No, the DSP56F805FV80 is not pin-compatible with other 56F80x variants such as the DSP56F803 or DSP56F807. While sharing the same 144-pin LQFP footprint, pin functions differ significantly - for example, the DSP56F805FV80 includes dual quadrature decoder inputs and 12 PWM outputs, whereas the DSP56F803 omits one PWM module and quadrature decoder. Migration requires PCB redesign and firmware adaptation for the DSP56F805FV80.

What debug interface does the DSP56F805FV80 use, and what signals are required?

The DSP56F805FV80 uses the JTAG/OnCE™ interface for non-intrusive, processor-speed-independent debugging. It requires five dedicated pins: TCK (test clock), TMS (test mode select), TDI (test data in), TDO (test data out), and TRST (test reset). All have internal pull-up or pull-down resistors, and TMS must be externally pulled to VDD via a 2.2 kΩ resistor per the DSP56F805FV80 datasheet recommendations.