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Table 1.8

Communication interfaces (2 of 2)

Feature

Functional description

Serial Peripheral Interface (SPI)

The Serial Peripheral Interface (SPI) has three 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 (CAN-FD)

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 16 receive buffers.

Quad Serial Peripheral Interface (QSPI) The Quad Serial Peripheral Interface (QSPI) is a memory controller for connecting a serial ROM

(nonvolatile memory such as a serial flash memory, serial EEPROM, or serial FeRAM) that has

an SPI-compatible interface.

Table 1.9

Analog

Feature

Functional description

12-bit A/D Converter (ADC12)

A 12-bit successive approximation A/D converter (ADC12) is provided. Analog input channels

are selectable up to 16. The temperature sensor output and an internal reference voltage are

selectable for conversion.

Temperature Sensor (TSN)

The on-chip Temperature Sensor (TSN) determines and monitors the die temperature for

reliable operation of the device. The sensor outputs a voltage directly proportional to the die

temperature, and the relationship between the die temperature and the output voltage is fairly

linear. The output voltage is provided to the ADC12 for conversion and can be further used by

the end application.

Table 1.10

Human machine interfaces

Feature

Functional description

Segment LCD Controller (SLCDC)

The SLCDC provides the following functions:

● Internal voltage boosting method, capacitor split method, and external resistance division

method are switchable

● VL1 or VL2 reference mode is selectable under internal voltage boosting method

● VCC or VL4 reference mode is selectable under capacitor split method

● Segment signal output: 48 (44)

● Common signal output: 4 (8)

● Waveform A or B selectable

● The LCD can be made to blink

Note:

The values in parentheses are the number of signal outputs when 8 com is

used.

Table 1.11

Data processing

Feature

Functional description

Cyclic Redundancy Check (CRC)

calculator

The Cyclic Redundancy Check (CRC) generates CRC codes to detect errors in the data. The

bit order of CRC calculation results can be switched for LSB-first or MSB-first communication.

Additionally, various CRC-generation polynomials are available.

Data Operation Circuit (DOC)

The Data Operation Circuit (DOC) compares, adds, and subtracts 32-bit data. When a selected

condition applies, 32-bit data is compared and an interrupt can be generated.

Table 1.12

I/O ports

Feature

Functional description

Programmable I/O ports

● I/O ports for the 100-pin LQFP

– I/O pins: 80

– Input pins: 3

– Pull-up resistors: 80

– N-ch open-drain outputs: 73

– 5-V tolerance: 4

● I/O ports for the 64-pin LQFP

– I/O pins: 46

– Input pins: 3

– Pull-up resistors: 46

– N-ch open-drain outputs: 39

– 5-V tolerance: 4

RA4C1 Datasheet

1. Overview

R01DS0457EJ0110 Rev.1.10

Jul 4, 2025

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