RA4M1 datasheet(7/131 Pages) RENESAS

7 / 131 page

R01DS0355EJ0110 Rev.1.10

Page 7 of 131

Sep 29, 2023

RA4M1 Group

1. Overview

Table 1.10

Data processing

Feature

Functional description

Cyclic Redundancy Check (CRC)

calculator

The Cyclic Redundancy Check (CRC) calculator 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. The snoop

function allows monitoring reads from and writes to specific addresses. This function is useful

in applications that require CRC code to be generated automatically in certain events, such as

monitoring writes to the serial transmit buffer and reads from the serial receive buffer. See

section 32, Cyclic Redundancy Check (CRC) Calculator in Userʼs Manual.

Data Operation Circuit (DOC)

The Data Operation Circuit (DOC) compares, adds, and subtracts 16-bit data. See section 42,

Data Operation Circuit (DOC) in Userʼs Manual.

Table 1.11

Security

Feature

Functional description

Secure Crypto Engine 5 (SCE5)

 Security algorithm

- Symmetric algorithm: AES.

 Other support features

- TRNG (True Random Number Generator)

- Hash-value generation: GHASH.

Table 1.12

I/O ports

Feature

Functional description

I/O ports

 I/O ports for the 100-pin LQFP, 100-pin LGA

- I/O pins: 81

- Input pins: 3

- Pull-up resistors: 79

- N-ch open-drain outputs: 64

- 5-V tolerance: 9

 I/O ports for the 64-pin LQFP, 64-pin QFN

- I/O pins: 49

- Input pins: 3

- Pull-up resistors: 47

- N-ch open-drain outputs: 36

- 5-V tolerance: 7

 I/O ports for the 48-pin LQFP, 48-pin QFN

- I/O pins: 33

- Input pins: 3

- Pull-up resistors: 31

- N-ch open-drain outputs: 22

- 5-V tolerance: 4

 I/O ports for the 40-pin QFN

- I/O pins: 25

- Input pins: 3

- Pull-up resistors: 23

- N-ch open-drain outputs: 15

- 5-V tolerance: 2

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