STMicroelectronics EVAL6470

Overview

EVAL6470 from STMicroelectronics is a demonstration board for the L6470H dSPIN microstepping motor driver IC, designed to evaluate voltage-mode driving, parameter tuning, and multi-motor daisy-chain operation. It supports 8–45 V motor supply, delivers up to 3 A_r.m.s. per phase, features dual SPI connectors (J10 master / J11 slave), includes external resonator/crystal socket, and integrates SW input and thermal monitoring with 40 °C/W junction-to-ambient resistance.

For engineers reviewing the EVAL6470 datasheet, EVAL6470 pinout, EVAL6470 application, or EVAL6470 equivalent, this board enables rapid validation of L6470H-based stepper control in industrial motion systems, lab automation setups, and multi-axis positioning platforms requiring precise current regulation and SPI-configurable acceleration profiles.

Technical Context

The EVAL6470 implements a complete evaluation environment for the L6470H - a fully integrated 8–45 V, 3 A_r.m.s. microstepping driver with embedded motion engine and SPI interface. It exposes all critical signals including BUSY/FLAG open-drain outputs, dual PWM inputs, ADCIN selection, and configurable logic supply routing via JP3–JP7 jumpers.

Daisy-chain capability is hardware-enabled through JP2 termination control and dedicated J10/J11 SPI connectors, allowing up to eight EVAL6470 boards to be driven by a single STEVAL-PCC009V2 interface board. The board's layout supports both crystal and ceramic resonator timing sources (Y1/Y2 footprints) and provides test points for VS, VREG, VDD, and GND.

Key Specifications

Availability

EVAL6470 is available at Aetrix Electronics and suitable for industrial motion control prototyping, lab-grade stepper system validation, and multi-axis robotics development requiring stable component supply and full L6470H feature access.

Supply support for EVAL6470 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 headquartered in Geneva, Switzerland, specializing in power management, motion control, microcontrollers, and analog/mixed-signal ICs for industrial, automotive, and consumer applications.

The EVAL6470 belongs to ST's dSPIN evaluation platform family, engineered specifically to accelerate adoption of intelligent stepper drivers by providing plug-and-play hardware, GUI software (dSPIN Evaluation Tool), and reference firmware for motion profiling and real-time parameter adjustment.

FAQ

Is EVAL6470 compatible with STEVAL-PCC009V1 and STEVAL-PCC009V2?

Yes. The EVAL6470 is explicitly designed to interface with both STEVAL-PCC009V1 and STEVAL-PCC009V2 communication boards via its J10 10-pin SPI connector. The dSPIN Evaluation Software supports both interface boards, and all documented setup procedures apply identically across versions.

What is the purpose of JP2 on EVAL6470?

JP2 configures daisy-chain termination: closed for standalone operation (SPI signal termination at J10), open for cascaded mode where J11 drives the next board's J10. This jumper ensures proper signal integrity when chaining multiple EVAL6470 boards - only the last board in the chain should have JP2 closed.

Can EVAL6470 drive bipolar stepper motors without external components?

Yes. The board integrates the L6470H IC, which contains dual H-bridges, current sensing, decay control, and motion engine logic. No external gate drivers, current sense resistors, or protection diodes are required - only motor phases (J2/J3), power supply (J4), and SPI interface (J10/J11) need connection.

Does EVAL6470 support both crystal and ceramic resonator timing sources?

Yes. The board provides footprints Y1 (crystal) and Y2 (ceramic resonator) with identical electrical connections to the L6470H OSCIN/OSCOUT pins. Either can be mounted - no solder modification or jumper change is needed, enabling flexible timing source selection based on stability or cost requirements.