RA2A1 datasheet(6/100 Pages) RENESAS

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R01DS0354EJ0110 Rev.1.10

Page 6 of 100

Mar 16, 2020

RA2A1 Datasheet

1. Overview

Controller Area Network (CAN)

module

The Controller Area Network (CAN) module provides functionality to receive and transmit data

using a message-based protocol between multiple slaves and masters in electromagnetically

noisy applications.

The CAN module complies with the ISO 11898-1 (CAN 2.0A/CAN 2.0B) standard and supports

up to 32 mailboxes, which can be configured for transmission or reception in normal mailbox

and FIFO modes. Both standard (11-bit) and extended (29-bit) messaging formats are

supported. See section 29, Controller Area Network (CAN) Module in User’s Manual.

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

supports full-speed and low-speed transfer as defined in the Universal Serial Bus Specification

2.0. The module has an internal USB transceiver and supports all of the transfer types defined

in the Universal Serial Bus Specification 2.0.

The USB has buffer memory for data transfer, providing a maximum of five 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.

The MCU supports Battery Charging Specification revision 1.2. Because the MCU can be

powered at 5 V, the USB LDO regulator provides the internal USB transceiver power supply

3.3 V. See section 26, USB 2.0 Full-Speed Module (USBFS) in User’s Manual.

Table 1.8

Analog (1 of 2)

Feature

Functional description

16-bit A/D Converter (ADC16)

A successive approximation 16-bit A/D Converter (ADC16) is provided. Up to 17 single-ended/

4 differential analog input channels are selectable. Reference voltage of SDADC24,

temperature sensor output, and internal reference voltage are selectable for conversion. The

calibration function calculates capacitor array DAC and gain/offset correction values under the

usage conditions to enable accurate

A/D conversion. See section 32, 16-Bit A/D Converter (ADC16) in User’s Manual.

24-bit Sigma-Delta A/D Converter

(SDADC24)

A 24-bit Sigma-Delta A/D Converter (SDADC24) with a programmable gain instrumentation

amplifier is provided. Up to 10 single-ended/5 differential analog input channels are selectable.

The 2 single-ended/1 differential analog input channels of these analog input channels are

inputs from internal OPAMP. Analog input multiplexer is input to the sigma-delta A/D converter

by the programmable gain instrumentation amplifier (PGA). The A/D conversion result is

filtered by the SINC3 digital filter, and then stored in an output register. The calibration function

calculates gain error and offset error correction values under the usage conditions to enable

accurate A/D conversion. See section 33, 24-Bit Sigma-Delta A/D Converter (SDADC24) in

User’s Manual.

12-bit D/A Converter (DAC12)

A 12-bit D/A Converter (DAC12) is provided. See section 34, 12-Bit D/A Converter (DAC12) in

User’s Manual.

8-bit D/A Converter (DAC8)

An 8-bit D/A Converter (DAC8) is provided. See section 35, 8-Bit D/A Converter (DAC8) in

User’s Manual.

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 linear.

The output voltage is provided to the ADC16 for conversion and can be further used by the end

application. See section 36, Temperature Sensor (TSN) in User’s Manual.

High-Speed Analog Comparator

(ACMPHS)

The High-Speed Analog Comparator (ACMPHS) compares a reference voltage with an analog

input voltage. The comparison result can be read by software and also be output externally.

The reference voltage can be selected from either an input to the IVREFi (i = 0 to 2) pin, an

output from internal D/A converter, or from the internal reference voltage (Vref) generated

internally in the MCU.

Such flexibility is useful in applications that require go/no-go comparisons to be performed

between analog signals without necessarily requiring A/D conversion. See section 38, High-

Speed Analog Comparator (ACMPHS) in User’s Manual.

Low-Power Analog Comparator

(ACMPLP)

The Low-Power Analog Comparator (ACMPLP) compares a reference voltage with an analog

input voltage. The comparison result can be read by software and also be output externally.

The reference voltage can be selected from either an input to the CMPREFi (i = 0, 1) pin, an

internal 8-bit D/A converter output, or the internal reference voltage (Vref) generated internally

in the MCU.

The ACMPLP response speed can be set before starting an operation. Setting high-speed

mode decreases the response delay time, but increases current consumption. Setting low-

speed mode increases the response delay time, but decreases current consumption. See

section 39, Low-Power Analog Comparator (ACMPLP) in User’s Manual.

Table 1.7

Communication interfaces (2 of 2)

Feature

Functional description

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