NXP Semiconductors

UM12262

FRDM-IMX91 Board User Manual

Term

Description

CAN

Controller area network

DNP

Do not populate

DRAM

Dynamic random access memory

DSI

Display serial interface

eMMC

Embedded multimedia card

ENET

Ethernet transceiver

EXPI

Expansion interface

FD

Flexible data rate

GPIO

General-purpose input/output

HS

High-speed

I2C

Inter-integrated circuit

I2S

Inter-IC sound

I3C

Improved inter-integrated circuit

LDO

Low dropout regulator

LED

Light-emitting diode

MISO

Master input slave output

MOSI

Master output slave input

MQS

Medium quality sound

NGFF

Next-generation form factor

PCB

Printed circuit board

PDM

Pulse-density modulation

PMIC

Power management-integrated circuit

PWM

Pulse width modulation

RGMII

Reduced gigabit media independent interface

SAI

Serial audio interface

SDIO

Secure digital I/O

SPI

Serial peripheral interface

SWD

Serial wire debug

TSN

Time-sensitive networking

UART

Universal asynchronous receiver/transmitter

USB

Universal serial bus

uSDHC

Ultra secured digital host controller

Table 24. Acronyms...continued

7 Related documentation

Table 25 lists and explains the additional documents and resources that you can refer to for more information

on the FRDM-IMX91 board. Some of the documents listed below may be available only under a nondisclosure

UM12262

All information provided in this document is subject to legal disclaimers.

© 2025 NXP B.V. All rights reserved.

User manual

Rev. 3.0 — 22 April 2025

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