STMicroelectronics EVAL-IBU-STR7

Overview

EVAL-IBU-STR7 from STMicroelectronics is a dedicated control interface board for the EVAL6460 demonstration platform, built around the STR711FR2 32-bit ARM7TDMI microcontroller with embedded Flash and RAM. It enables PC-based evaluation of the L6460 SPI-configurable multi-motor driver via RS232 serial communication and a 34-pin ribbon cable, supporting full configuration of stepper/DC motor bridges, regulators, GPIOs, ADC, and interrupt management.

For engineers reviewing the EVAL-IBU-STR7 datasheet, EVAL-IBU-STR7 pinout, EVAL-IBU-STR7 application, or EVAL-IBU-STR7 equivalent, this board serves as the master controller in L6460 evaluation systems-providing SPI command sequencing, real-time register read/write, flexSPIN software integration, and hardware-level startup/jumper coordination (e.g., nAwake source, device ID, reset feedback).

Technical Context

The EVAL-IBU-STR7 implements a fixed-function master interface: it translates PC serial commands into SPI transactions targeting the L6460 slave device, managing address decoding, timing synchronization, and status polling over the 34-pin interconnect. Its STR711FR2 MCU runs preloaded firmware that handles protocol framing, error detection, and register mapping per AN3097 sections 3.1–3.14.

All I/O is hardwired for EVAL6460 compatibility: UART (RS232) connects to PC; SPI signals (SCLK, MOSI, MISO, nSS) route directly to J10; GPIOs control jumpers (JP1, JP5–JP7, JP9); and dedicated lines manage nAwake, nReset feedback, and VSWDRV enable. No user-programmable firmware or reconfiguration capability is provided-the board operates exclusively as a closed-loop evaluation controller.

Key Specifications

Availability

EVAL-IBU-STR7 is available at Aetrix Electronics and suitable for multi-motor evaluation labs, industrial motion prototyping, and L6460-based design validation requiring stable component supply and traceable evaluation hardware sourcing.

Supply support for EVAL-IBU-STR7 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, specializing in microcontrollers, power ICs, and motor control solutions for automotive, industrial, and consumer applications.

The EVAL-IBU-STR7 belongs to ST's motor control evaluation ecosystem and was designed specifically to accelerate adoption of the L6460 by providing a turnkey, software-integrated master interface-eliminating custom controller development for initial system characterization.

FAQ

Is EVAL-IBU-STR7 programmable or field-upgradable?

No. The STR711FR2 MCU is factory-programmed with fixed flexSPIN host firmware and lacks user-accessible debug interfaces or bootloader functionality. Firmware updates require ST-provided tools and are not supported in standard evaluation use. All configuration occurs via PC software commands-not MCU code changes.

Can EVAL-IBU-STR7 be used with other motor driver boards besides EVAL6460?

No. Its hardware layout, pinout mapping, and firmware are exclusively tailored to the EVAL6460's J10 connector, signal timing, and L6460 register set. There is no generic SPI master capability-it does not support arbitrary slave devices or configurable SPI protocols beyond AN3097-defined L6460 transactions.

What is the role of the 34-pin ribbon cable in the EVAL-IBU-STR7/EVAL6460 system?

The 34-pin cable carries bidirectional SPI signals (SCLK, MOSI, MISO, nSS), power (3.3 V, GND), control lines (nAwake, nReset feedback), and dedicated GPIOs for jumper automation (JP1, JP5–JP7, JP9). It is mechanically and electrically specified in AN3097 Figure 5 and Table 2, and no alternate cabling is validated.

Does EVAL-IBU-STR7 provide isolated communication or voltage level translation?

No. The RS232 interface uses standard MAX232-level signaling (±12 V), and all digital I/O to EVAL6460 operates at 3.3 V logic levels without galvanic isolation or level-shifting circuitry. Direct connection to grounded PC and EVAL6460 is required; no protection against ground loops or voltage mismatches is implemented.