RX72N datasheet(11/179 Pages) RENESAS

11 / 179 page

RX72N Group

1. Overview

R01DS0343EJ0120 Rev.1.20

Page 11 of 179

Nov 15, 2023

12-bit A/D converter (S12ADFa)

 12 bits × 2 units (unit 0: 8 channels; unit 1: 21 channels)

 12-bit resolution (switchable between 8, 10, and 12 bits)

 Conversion time

0.48 µs per channel (for 12-bit conversion)

0.45 µs per channel (for 10-bit conversion)

0.42 µs per channel (for 8-bit conversion)

 Operating mode

Scan mode (single scan mode, continuous scan mode, or 3 group scan mode)

Group priority control (only for 3 group scan mode)

 Sample-and-hold function

Common sample-and-hold circuit included

In addition, channel-dedicated sample-and-hold function (3 channels: in unit 0 only)

included

 Sampling variable

Sampling time can be set up for each channel.

 Digital comparison

Method: Comparison to detect voltages above or below thresholds and window

comparison

Measurement: Comparison of two results of conversion or comparison of a value in the

comparison register and a result of conversion

 Self-diagnostic function

The self-diagnostic function internally generates three analog input voltages

(unit 0: VREFL0, VREFH0 × 1/2, VREFH0; unit 1: AVSS1, AVCC1 × 1/2, AVCC1)

 Double trigger mode (A/D conversion data duplicated)

 Detection of analog input disconnection

 Three ways to start A/D conversion

Software trigger, timer (MTU, TMR, TPU) trigger, external trigger

 Event linking by the ELC

12-bit D/A converter (R12DAa)

 2 channels

 12-bit resolution

 Output voltage: 0.2 V to AVCC1 – 0.2 V (buffered output), 0 V to AVCC1 (unbuffered

output)

 Buffered output or unbuffered output can be selected.

 Event linking by the ELC

Temperature sensor

 1 channel

 Relative precision: ± 1°C

 The voltage of the temperature is converted into a digital value by the 12-bit A/D

converter (unit 1).

Safety

Memory protection unit

(MPU)

 Protection area: Eight areas (max.) can be specified in the range from 0000 0000h to

FFFF FFFFh.

 Minimum protection unit: 16 bytes

 Reading from, writing to, and enabling the execution access can be specified for each

area.

 An access exception occurs when the detected access is not in the permitted area.

Trusted Memory (TM)

Function

 Programs in the TM target area in the code flash memory are protected against reading

 Instruction fetching by the CPU is the only form of access to these areas when the TM

function is enabled.

function

 Protects important registers from being overwritten for in case a program runs out of

control.

CRC calculator (CRCA)

 Generation of CRC codes for 8-/32-bit data

8-bit data

Selectable from the following three polynomials

X8 + X2 + X + 1, X16 + X15 + X2 + 1, X16 + X12 + X5 + 1

32-bit data

Selectable from the following two polynomials

X32 + X26 + X23 + X22 + X16 + X12 + X11 + X10 + X8 + X7 + X5 + X4 + X2 + X + 1,

X32 + X28 + X27 + X26 + X25 + X23 + X22 + X20 + X19 + X18 + X14 + X13 + X11 + X10 + X9 +

X8 + X6 + 1

 Generation of CRC codes for use with LSB-first or MSB-first communications is

selectable

Main clock oscillation

stop detection

 Main clock oscillation stop detection: Available

Table 1.1

Outline of Specifications (10/11)

Classification

Module/Function

Description

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