NXP Semiconductors FRDM7X-INTERFACE

Overview

FRDM7X-INTERFACE from NXP Semiconductors is a breakout interface board designed to adapt NXP's BRKTSTBAPx7250 series pressure sensor evaluation boards (analog, I2C, and SPI variants) to NXP Freedom MCU development platforms. It features a 4-position DIP switch (SW1) for protocol selection, Arduino-compatible headers for physical interfacing, and supports FXPS7250-series barometric absolute pressure sensors across 15–400 kPa ranges. It enables rapid sensor evaluation with FRDM-KE15Z (I2C/analog) or FRDM-K64F (SPI) MCUs.

For engineers reviewing the FRDM7X-INTERFACE datasheet, FRDM7X-INTERFACE pinout, FRDM7X-INTERFACE application, or FRDM7X-INTERFACE equivalent, this board serves as a configurable hardware bridge between pressure sensor breakout boards and NXP Freedom development ecosystems - critical for automotive MAP/BAP sensor prototyping, gas tank pressure validation (CNG/LPG), and intake manifold air mixture characterization.

Technical Context

The FRDM7X-INTERFACE operates as a passive signal routing and level-adaptation interface - not a controller or signal processor. It provides no active logic, voltage regulation, or protocol translation; instead, it routes VCC, GND, I/O signals (SCL/SDA, MOSI/MISO/SCLK/SS_B, ADC_IN), and interrupt lines between the BRKTSTBAPx7250 breakout boards and Freedom MCU headers via fixed pin mappings and SW1-configurable signal paths.

Its design centers on mechanical and electrical compatibility: Arduino UNO R3 footprint alignment, 3.3 V logic-level pass-through, and switch-selectable pull-up/pull-down configurations matching FXPS7250 sensor interface requirements. The board contains no ICs, memory, or firmware - only passive components (resistors, capacitors), headers, and the SW1 DIP switch.

Key Specifications

Availability

FRDM7X-INTERFACE is available at Aetrix Electronics and suitable for automotive pressure sensor evaluation, CNG/LPG tank monitoring systems, and intake manifold air mixture analysis requiring stable component supply during early-stage prototyping and firmware validation.

Supply support for FRDM7X-INTERFACE 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 company specializing in secure connectivity solutions for automotive, industrial, IoT, and mobile applications - with leadership in MCUs, sensors, and edge processing.

The FRDM7X-INTERFACE belongs to NXP's Freedom Development Platform ecosystem and was designed specifically to unify evaluation of FXPS7250-series barometric and manifold absolute pressure sensors across analog, I2C, and SPI variants using standardized Freedom MCU hardware.

FAQ

What is the primary function of the FRDM7X-INTERFACE board?

The FRDM7X-INTERFACE board is a passive hardware adapter that enables connection between BRKTSTBAPx7250 pressure sensor breakout boards (analog/I2C/SPI) and NXP Freedom MCU development platforms. It provides Arduino-compatible headers and a 4-position DIP switch (SW1) to configure signal routing - no active components or firmware are present on the FRDM7X-INTERFACE itself.

Which NXP Freedom MCU boards are compatible with FRDM7X-INTERFACE?

The FRDM7X-INTERFACE is validated for use with FRDM-KE15Z (for analog and I2C sensor variants) and FRDM-K64F (for SPI sensor variants). Its Arduino UNO R3 footprint ensures mechanical compatibility with other Freedom boards featuring the same header layout, though software support and pin mapping are confirmed only for those two models per UM11863.

Does FRDM7X-INTERFACE include voltage regulation or level-shifting circuitry?

No. The FRDM7X-INTERFACE board contains only passive components (resistors, capacitors), headers, and the SW1 DIP switch. It provides direct pass-through of 3.3 V power and signals from the host Freedom MCU - no onboard regulators, level shifters, or signal conditioning. Users must ensure voltage compatibility between sensor breakout boards and the MCU.

How is communication protocol selected on FRDM7X-INTERFACE?

Protocol selection is performed exclusively via the 4-position DIP switch SW1. Per UM11863 Table 5: Analog mode sets SW1-1 to left; SPI mode sets SW1-2 and SW1-3 to left; I2C mode sets SW1-2 and SW1-3 to right. SW1-4 is unused ("don't care") in all configurations.

Can FRDM7X-INTERFACE be used without a Freedom MCU board?

No - the FRDM7X-INTERFACE has no standalone functionality. It lacks power generation, microcontroller, or firmware. It serves solely as an interposer between BRKTSTBAPx7250 sensor boards and Freedom MCUs. Operation requires pairing with a supported Freedom board (e.g., FRDM-KE15Z or FRDM-K64F) and appropriate software (NXP Component Library drivers).