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Table 1.6

Timers (2 of 2)

Feature

Functional description

Watchdog Timer (WDT)

The Watchdog Timer (WDT) is a 14-bit down counter that can be used to reset the MCU when

the counter underflows because the system has run out of control and is unable to refresh the

WDT. In addition, the WDT can be used to generate a non-maskable interrupt or an underflow

interrupt.

Independent Watchdog Timer (IWDT)

The Independent Watchdog Timer (IWDT) consists of a 14-bit down counter that must be

serviced periodically to prevent counter underflow. The IWDT provides functionality to reset

the MCU or to generate a non-maskable interrupt or an underflow interrupt. Because the timer

operates with an independent, dedicated clock source, it is particularly useful in returning the

MCU to a known state as a fail-safe mechanism when the system runs out of control. The IWDT

can be triggered automatically by a reset, underflow, refresh error, or a refresh of the count value

in the registers.

Table 1.7

Communication interfaces

Feature

Functional description

Serial Communications Interface (SCI)

The Serial Communications Interface (SCI) × 2 channels have asynchronous and synchronous

serial interfaces:

● Asynchronous interfaces (UART and Asynchronous Communications Interface Adapter

(ACIA))

● 8-bit clock synchronous interface

● Simple IIC (master-only)

● Simple SPI

● Smart card interface

● Manchester interface

The smart card interface complies with the ISO/IEC 7816-3 standard for electronic signals and

transmission protocol. SCIn (n = 0, 9) has FIFO buffers to enable continuous and full-duplex

communication, and the data transfer speed can be configured independently using an on-chip

baud rate generator.

I3C bus interface (I3C)

The I3C bus interface (I3C) has one channel. The I3C module conforms with and provides a

subset of the NXP I2C (Inter-Integrated Circuit) bus interface functions and a subset of the MIPI

I3C.

Serial Peripheral Interface (SPI)

The Serial Peripheral Interface (SPI) has 2 channels. The SPI provides high-speed full-duplex

synchronous serial communications with multiple processors and peripheral devices.

Control Area Network with Flexible

Data-Rate Module (CANFD)

The CAN with Flexible Data-Rate (CANFD) module can handle classical CAN frames and

CANFD frames complied with ISO 11898-1 standard.

The module supports 4 transmit buffers and 32 receive buffers.

USB 2.0 Full-Speed module (USBFS)

The USB 2.0 Full-Speed module (USBFS) can operate as a device controller. The module

supports full-speed transfer as defined in Universal Serial Bus Specification 2.0. The module has

an internal USB transceiver and supports all the transfer types defined in Universal Serial Bus

Specification 2.0. The USB has buffer memory for data transfer, providing a maximum of 5 pipes.

Pipe 0 and pipe 4 to pipe 7 can be assigned any endpoint number based on the peripheral

devices used for communication or based on your system.

Serial Sound Interface Enhanced (SSIE) The Serial Sound Interface Enhanced (SSIE) peripheral provides functionality to interface with

digital audio devices for transmitting I2S/Monaural/TDM audio data over a serial bus. The SSIE

supports an audio clock frequency of up to 50 MHz, and can be operated as a slave or master

receiver, transmitter, or transceiver to suit various applications. The SSIE includes 32-stage FIFO

buffers in the receiver and transmitter, and supports interrupts and DMA-driven data reception

and transmission.

Consumer Electronics Control module

(CEC)

The CEC transmission/reception module can generate and receive CEC signals complied with

the High-Definition Multimedia Interface (HDMI) Version 1.4b. The module can also automatically

detect communication states.

Table 1.8

Analog (1 of 2)

Feature

Functional description

12-bit A/D Converter (ADC12)

A 12-bit successive approximation A/D converter (ADC12) is provided. Up to 12 analog

input channels are selectable. Temperature sensor output and internal reference voltage are

selectable for conversion.

12-bit D/A Converter (DAC12)

A 12-bit D/A converter (DAC12) is provided.

RA4E2 Datasheet

1. Overview

R01DS0413EJ0150 Rev.1.50

May 29, 2026

Page 4 of 91

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