The R8C/22 Group is supported only for customers who have already adopted these products. The RL78/F12, F13, F14, F15 Groups are recommended for new designs.

This MCU is built using the high-performance silicon gate CMOS process using the R8C CPU core and is packaged in a 48-pin plastic molded LQFP. This MCU operates using sophisticated instructions featuring a high level of instruction efficiency. With 1Mb of address space, it is capable of executing instructions at high speed. This Furthermore, the data flash (1KB x 2 blocks) is embedded in the R8C/21 Group. The difference between R8C/20 and R8C/21 Groups is only the existence of the data flash. Their peripheral functions are the same.

Applications

  • Automotive

Product Options

Download Toggle Controls Full Screen Reset
Flash Memory (KB) RAM (KB) Lead Count (#) Temp. Range PLP Buy / Sample

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
R8C/22, R8C/23 Group Datasheet – Datasheet PDF 473 KB
R8C/16, R8C/17 Group Datasheet 日本語 Datasheet PDF 648 KB
User Guides & Manuals
RX Development Environment Migration Guide Migration from M16C Family to RX Family (Compiler ed.) (High-performance Embedded Workshop and NC30WA to CS+ and CC-RX) 日本語 Guide PDF 378 KB
R0E000010CKZ11 User's Manual (Small Connector Conversion Adapter for E1 Emulator) 日本語 Manual PDF 178 KB
Real-time OS RI600/4 for RX600 Series Application Note: Application Transition Guide (from M3T-MR30/4 to RI600/4) 日本語 Guide PDF 371 KB
RX Compiler Application Notes: 4-Sample Project RX Migration Guide: M16C Edition 日本語 Guide PDF 926 KB
R8C/22, R8C/23 Group Hardware Manual 日本語 Manual PDF 5.43 MB
E8 Emulator R0E000080KCE00 User's Manual 日本語 Manual PDF 2.28 MB
R8C/Tiny Series Software Manual 简体中文 Manual PDF 1.38 MB
SH-2E SH7055S Hardware Manual 日本語, 简体中文 Manual PDF 4.87 MB
Technical Updates
Notes on Complementary PWM Mode and Reset Synchronous PWM Mode of Timer RD 日本語 Technical Update PDF 33 KB
R8C Family Notes on I2C-bus Interface 日本語 Technical Update PDF 34 KB
M16C Family Usage Precautions when Clearing Interrupt Request Bit – Technical Update PDF 29 KB
CAN transceiver control method with boot mode 日本語 Technical Update PDF 43 KB
Application Notes & White Papers
- R8C/35C Group I2C bus Single Master Control Program (Master Transmit/Receive) I2C Communication for Issuing Restart Condition 日本語 Application Note PDF 586 KB
R8C/35C Group I2C bus Single Master Control Program (Master Transmit/Receive) I2C Communication for Issuing Restart Condition 日本語 Application Note PDF 586 KB
Compiler Package Application Note: The application guide of Call Walker 日本語 Application Note PDF 243 KB
R8C/1x, 2x Series Standard Serial I/O Mode Protocol Specification 日本語 Application Note PDF 178 KB
- R8C/25 Group Timer RA in Timer Mode 日本語 Application Note PDF 287 KB
- R8C/25 Group Timer RA in Pulse Output Mode 日本語 Application Note PDF 297 KB
- R8C/25 Group Timer RD in Input Capture Function 日本語 Application Note PDF 516 KB
- R8C/25 Group Timer RD in Output Compare Function 日本語 Application Note PDF 572 KB
- R8C/25 Group Timer RD in PWM Mode 日本語 Application Note PDF 568 KB
- R8C/25 Group Timer RD in Reset Synchronous PWM Mode 日本語 Application Note PDF 557 KB
- R8C/25 Group Timer RD in Complementary PWM Mode 日本語 Application Note PDF 688 KB
- R8C/25 Group Timer RD in PWM3 Mode 日本語 Application Note PDF 526 KB
- R8C/35C Group Flash Memory Low-Current-Consumption Read Mode 日本語 Application Note PDF 645 KB
- R8C/35C Group Rewriting Program ROM Using EW0 Mode 日本語 Application Note PDF 603 KB
R8C/35C Group Flash Memory Low-Current-Consumption Read Mode 日本語 Application Note PDF 645 KB
R8C/35C Group Rewriting Program ROM Using EW0 Mode 日本語 Application Note PDF 603 KB
R8C/35C Group I²C bus Single Master Control Program (Slave Transmit/Receive) 日本語 Application Note PDF 764 KB
R8C/35C Group I²C bus Single Master Control Program (Master Transmit/Receive) 日本語 Application Note PDF 766 KB
R8C Family Implementing Time Event Handlers in MR8C/4 – Application Note PDF 938 KB
R8C Family Implementing System Timer in MR8C/4 – Application Note PDF 126 KB
R8C Family Implementing Interrupts in MR8C/4 – Application Note PDF 695 KB
High-performance Embedded Workshop Application Note: Real-time OS aware debugging 日本語 Application Note PDF 750 KB
SH7670 Renesas Starter Kit Sample Code 日本語, 简体中文 Application Note PDF 73 KB
SH7286 Renesas Starter Kit Sample Code 日本語, 简体中文 Application Note PDF 73 KB
Creating Workspace with MR8C/4 简体中文 Application Note PDF 897 KB
How to Compute MR8C/4 User Stack and System Stack 简体中文 Application Note PDF 583 KB
Debugging with MR8C/4 简体中文 Application Note PDF 469 KB
How to use Data Queue in place of Mailbox – Application Note PDF 325 KB
How to Implement MR8C/4 in Embedded Applications – Application Note PDF 760 KB
How to Implement Timeout Feature in MR8C4 – Application Note PDF 152 KB
General RTOS Concepts – Application Note PDF 801 KB
- Flash Over CAN – Application Note PDF 1.15 MB
Simple Flash API for R8C M16C M32C R32C – Application Note PDF 302 KB
R8C/2x Series VDE Certified IEC60730 Self Test Code for R8C/2x Series MCU – Application Note PDF 281 KB
Low Power Consumption Mode Using Low Speed Periodic Wakeup 日本語, 简体中文 Application Note PDF 112 KB
- Perl Script to Convert S-Record Data to a C Structure 日本語, 简体中文 Application Note PDF 632 KB
- Utility To Convert S-Record Data To A C-Structure – Application Note PDF 255 KB
Perl Script to Convert S-Record Data to a C Structure 日本語, 简体中文 Application Note PDF 632 KB
Utility To Convert S-Record Data To A C-Structure – Application Note PDF 255 KB
Self Test Sample Code for Renesas Microcontrollers – Application Note PDF 364 KB
- Program ROM Rewrite Using EW0 Mode 日本語 Application Note PDF 227 KB
SH7211 Renesas Starter Kit Sample Code 日本語, 简体中文 Application Note PDF 62 KB
R8C23 Renesas Starter Kit Sample Code – Application Note PDF 62 KB
- Serial EEPROM of HN58X25xxx Series Control Using Clock Synchronous Serial I/O (UART) of M16C – Application Note PDF 228 KB
Countermeasures against noise – Application Note PDF 215 KB
CAN Application Note – Application Note PDF 451 KB
Programming Guidelines Assembly Language – Application Note PDF 898 KB
M3T-NC308WA, M3T-NC30WA Application Notes (C Compilers for M16C Family) – Application Note PDF 2.05 MB
Programming Guidelines C Language – Application Note PDF 683 KB
General-purpose Program for Transferring Blocks – Application Note PDF 104 KB
General-purpose Program for Compressing BCD – Application Note PDF 106 KB
General-purpose Program for Changing Blocks – Application Note PDF 107 KB
General-purpose Program for Clearing RAM – Application Note PDF 103 KB
General-purpose Program for Indirect Subroutine Call – Application Note PDF 145 KB
The Software Reset Judging Method – Application Note PDF 127 KB
High-performance Embedded Workshop Tcl/Tk Application Note – Application Note PDF 1.43 MB
Operation of Timer A (event counter mode. reload type) 日本語 Application Note PDF 64 KB
Operation of Timer A (timer mode. gate function) 日本語 Application Note PDF 62 KB
Operation of Timer A (timer mode) 日本語 Application Note PDF 61 KB
Protect Operation 日本語 Application Note PDF 59 KB
Concept of the Power Control 日本語 Application Note PDF 490 KB
PCNs & PDNs
Unification of a JEDEC tray and a embossed carrier tape for LQFP package (Additional Information & Correction) 日本語 Product Change Notice PDF 4.86 MB
Unification of a JEDEC tray and a embossed carrier tape for LQFP package 日本語 Product Change Notice PDF 3.74 MB
Unification of a JEDEC tray and a embossed carrier tape for LQFP package 日本語 Product Change Notice PDF 1.46 MB
Downloads
R8C/35C Group I2C bus Single Master Control Program (Master Transmit/Receive) I2C Communication for Issuing Restart Condition 日本語 Sample Code ZIP 677 KB
- R8C/35C Group I2C bus Single Master Control Program (Master Transmit/Receive) I2C Communication for Issuing Restart Condition 日本語 Sample Code ZIP 677 KB
[Evaluation Software] Flash Development Toolkit V.4.09 Release 03 日本語 Evaluation Software EXE 40.31 MB
Flash Development Toolkit V.4.09 Release 03 Upgrade 日本語 Upgrade - Programmer EXE 40.31 MB
[Evaluation Software] Flash Development Toolkit V.4.09 Release 02 日本語 Evaluation Software EXE 41.01 MB
Flash Development Toolkit V.4.09 Release 02 (Light version) Upgrade 日本語 Upgrade - Programmer EXE 10.45 MB
Flash Development Toolkit V.4.09 Release 02 Upgrade 日本語 Upgrade - Programmer EXE 41.01 MB
Flash Development Toolkit V.4.09 Release 01 Upgrade 日本語 Upgrade - Programmer EXE 41.03 MB
Flash Development Toolkit V.4.09 Release 01 (Light version) Upgrade 日本語 Upgrade - Programmer EXE 10.47 MB
Flash Development Toolkit V.4.09 Release 00 Upgrade 日本語 Upgrade - Programmer EXE 41.03 MB
Flash Development Toolkit V.4.08 Release 02 (Light version) Upgrade 日本語 Upgrade - Programmer EXE 3.22 MB
Flash Development Toolkit V.4.08 Release 02 Upgrade 日本語 Upgrade - Programmer EXE 39.98 MB
High-performance Embedded Workshop V.4.09.01 Full Update 日本語 Upgrade - IDE EXE 68.25 MB
High-performance Embedded Workshop V.4.09.01 Differential Update(From V.4.09.00) 日本語 Upgrade - IDE EXE 15.89 MB
R8C/25 Group Timer RA in Timer Mode 日本語 Sample Code ZIP 280 KB
R8C/25 Group Timer RA in Pulse Output Mode 日本語 Sample Code ZIP 290 KB
R8C/25 Group Timer RD in Input Capture Function 日本語 Sample Code ZIP 500 KB
R8C/25 Group Timer RD in Output Compare Function 日本語 Sample Code ZIP 560 KB
R8C/25 Group Timer RD in PWM Mode 日本語 Sample Code ZIP 551 KB
R8C/25 Group Timer RD in Reset Synchronous PWM Mode 日本語 Sample Code ZIP 541 KB
R8C/25 Group Timer RD in Complementary PWM Mode 日本語 Sample Code ZIP 670 KB
R8C/25 Group Timer RD in PWM3 Mode 日本語 Sample Code ZIP 509 KB
Flash Development Toolkit V.4.08 Release 01 (Light version) Upgrade 日本語 Upgrade - Programmer EXE 24.65 MB
Flash Development Toolkit V.4.08 Release 01 Upgrade 日本語 Upgrade - Programmer EXE 40.02 MB
E8a Emulator Software V.1.05 Release 01 (Full package) 日本語 Upgrade - Debugger EXE 309.49 MB
R8C E8a Emulator debugger V.1.05.01 (Debugger package version of E8a Emulator Software V.1.05 Release 01) 日本語 Upgrade - Debugger EXE 46.03 MB
High-performance Embedded Workshop Real-Time OS Aware Debugging Upgrade module 日本語 Upgrade - OS ZIP 119 KB
R8C/35C Group Flash Memory Low-Current-Consumption Read Mode 日本語 Sample Code ZIP 857 KB
R8C/35C Group Rewriting Program ROM Using EW0 Mode 日本語 Sample Code ZIP 1.09 MB
- R8C/35C Group Flash Memory Low-Current-Consumption Read Mode 日本語 Sample Code ZIP 857 KB
- R8C/35C Group Rewriting Program ROM Using EW0 Mode 日本語 Sample Code ZIP 1.09 MB
- R8C/35C Group I²C bus Single Master Control Program (Slave Transmit/Receive) 日本語 Sample Code ZIP 966 KB
- R8C/35C Group I²C bus Single Master Control Program (Master Transmit/Receive) 日本語 Sample Code ZIP 964 KB
- SH7670 Renesas Starter Kit Sample Code – Sample Code ZIP 352 KB
- 周期およびデューティー可変のPWM出力 – Sample Code ZIP 377 KB
- 定时器RD（输入捕捉功能） – Sample Code ZIP 1.03 MB
- SH7286 Renesas Starter Kit Sample Code – Sample Code ZIP 480 KB
- ディレードワンショット出力 – Sample Code ZIP 456 KB
- 定时器RD（输出比较功能） – Sample Code ZIP 1.12 MB
- Sample codes for RX Compiler Package Application Notes: Sample Project RX Migration Guide, M16C Edition 日本語 Sample Code ZIP 56 KB
- Source code for Workspace Creation Application Note on MR8C/4 OS – Sample Code ZIP 879 KB
- 看门狗定时器的使用 – Sample Code ZIP 283 KB
- 定时器Ａ操作（事件计数模式中的二相脉冲信号处理、4倍频方式） – Sample Code ZIP 264 KB
- Source code for Application note on how to debug applications running on MR8C/4 – Sample Code ZIP 877 KB
- 定时器 A操作（事件计数模式、自由运行方式） – Sample Code ZIP 257 KB
- Source code for Application Note on how to use Data Queue in place of Mailbox – Sample Code ZIP 364 KB
- Source code for Application Note on how to implement MR8C/4 in Embedded Applications – Sample Code ZIP 952 KB
- Source code for Application Note on Implementing Timeout Feature in MR8C/4 – Sample Code ZIP 176 KB
Flash Over CAN – Sample Code ZIP 6.42 MB
- Simple Flash API for R8C M16C M32C R32C – Sample Code ZIP 325 KB
E8a self-check program V.1.00.02 日本語 Software ZIP 116 KB
Install Manager Utility V.1.03.01 Upgrade 日本語 Software EXE 1.30 MB
- R8C/2x Series VDE Certified IEC60730 Self Test Code for R8C/2x Series MCU – Sample Code ZIP 5.59 MB
Peripheral Driver Generator V.1.04 (for SH/Tiny, M16C/60, M16C/Tiny, R8C/1x, R8C/2x, H8S/Tiny, H8/300H Tiny Series) 日本語 Software EXE 27.21 MB
- Low Power Consumption Mode Using Low Speed Periodic Wakeup – Sample Code ZIP 156 KB
- 長い周期のタイマ – Sample Code ZIP 378 KB
AutoUpdate Utility V.1.05.00 Upgrade 日本語 Software EXE 7.57 MB
Renesas MCU Perl Script to Convert S-Record Data to a C Structure – Sample Code ZIP 613 KB
Renesas MCU Utility To Convert S-Record Data To A C-Structure – Sample Code ZIP 303 KB
- Renesas MCU Perl Script to Convert S-Record Data to a C Structure – Sample Code ZIP 613 KB
- タイマA動作(ワンショットタイマモード、外部トリガ) – Sample Code ZIP 391 KB
- Renesas MCU Utility To Convert S-Record Data To A C-Structure – Sample Code ZIP 303 KB
- R8C Tiny, M16C Tiny, SH Tiny, and H8 Tiny Series Self Test Sample Code for Renesas Microcontrollers – Sample Code ZIP 1.70 MB
Program ROM Rewrite Using EW0 Mode – Sample Code ZIP 721 KB
- SH7211 Renesas Starter Kit Sample Code – Sample Code ZIP 661 KB
- タイマA（アウトプットコンペア） – Sample Code ZIP 605 KB
- R8C23 Renesas Starter Kit Sample Code 日本語 Sample Code ZIP 687 KB
Serial EEPROM HN58X25xxx Series Sample Program M16C（UART） – Sample Code ZIP 272 KB
M16C R8C Compact Emulator Debugger V.1.03 Release 00 Upgrade 日本語 Upgrade - Debugger EXE 73.85 MB
M16C R8C PC7501 Emulator Debugger V.1.03 Release 00 Upgrade 日本語 Upgrade - Debugger EXE 78.98 MB
- General-purpose Program for Transferring Blocks – Sample Code ZIP 49 KB
- General-purpose Program for Compressing BCD – Sample Code ZIP 51 KB
- General-purpose Program for Changing Blocks – Sample Code ZIP 51 KB
- General-purpose Program for Clearing RAM – Sample Code ZIP 48 KB
- General-purpose Program for Indirect Subroutine Call – Sample Code ZIP 65 KB
- The Software Reset Judging Method – Sample Code ZIP 64 KB
- Operation of Timer A (event counter mode. reload type) – Sample Code ZIP 38 KB
- Operation of Timer A (timer mode. gate function) – Sample Code ZIP 36 KB
- BCD圧縮汎用プログラム – Sample Code ZIP 86 KB
- Operation of Timer A (timer mode) – Sample Code ZIP 34 KB
- 間接サブルーチン呼び出し汎用プログラム – Sample Code ZIP 94 KB
- Protect Operation – Sample Code ZIP 31 KB
- ブロック交換汎用プログラム – Sample Code ZIP 85 KB
Tool News
[Notes] C/C++ Compiler Package for M16C and R8C Families 日本語 Tool News - Note PDF 141 KB
[Notification] End of Life (EOL) Notice for E1 Emulator 日本語 Tool News - Notification PDF 354 KB
E8a Emulator Software Revised to V.1.03 Release 04 日本語 Tool News - Release PDF 368 KB
Flash Development Toolkit Revised to V.4.05 Release 00 日本語 Tool News - Release PDF 365 KB
Flash Development Toolkit Revised to V.3.07 Release 05 日本語 Tool News - Release PDF 193 KB
E8a Emulator Software Revised to V.1.03 Release 03 日本語 Tool News - Release PDF 197 KB
A Note on Using E8a Emulator Software 日本語 Tool News - Note PDF 194 KB
Flash Development Toolkit Revised to V.4.04 Release 00 日本語 Tool News - Release PDF 199 KB
High-performance Embedded Workshop Revised to V.4.07.00 日本語 Tool News - Release PDF 199 KB
E8a Emulator Software Revised to V.1.03 Release 02 日本語 Tool News - Release PDF 195 KB
E8a Emulator Software Revised to V.1.03 Release 01 日本語 Tool News - Release PDF 195 KB
Other
Renesas Microcomputer R8C Family Selection Guide 日本語 Brochure PDF 2.56 MB
MCU M16C Family (R32C/M32C/M16C/R8C) – Brochure PDF 29.76 MB
R8C/22, R8C/23 Group Register Definition 日本語 Software & Tools - Others ZIP 26 KB
Renesas Semiconductor Lead-Free Packages – Brochure PDF 1.32 MB
info: For device-specific or order-specific documentation, submit a support request.

Software / Tools

Title Type Description Company
Peripheral Driver Generator Code Generator A tool for automatically generating drivers for the built-in peripheral I/Os of a microcomputer (for RX210, RX220, RX63x, and RX62x)
 Renesas
SPI/QSPI Serial Flash Memory, QSPI Serial Phase Change Memory Driver Serial Memory Device Driver for SPI and QSPI Serial Flash Memory and QSPI Serial Phase Change Memory Renesas
SPI Serial EEPROM Driver Serial Memory Device Drivers for SPI Bus Serial EEPROM R1EX25xxx Series and HN58X25xxx Series Renesas
M3T-MR30/4 Real-time OS for M16C Series and R8C Family ITRON OS μITRON4.0 Specification real-time OS for M32C/80, M16C/80 Series [Required IDE :High-performance Embedded Workshop]

 Renesas
C/C++ Compiler Package for R8C and M16C Families Compiler/Assembler C/C++ Compiler Package for R8C Family and M16C Family (R32C/M32C/M16C) , * Packed the following three compiler packages : [Content] C Compiler Package for R32C Series, C Compiler Package for M32C Series [M3T-NC308WA], and C/C++ Compiler Package for M16C Series and R8C Family [M3T-NC30WA]. They are bundled with the simulator debugger and High-performance Embedded Workshop.
 Renesas
MISRA C Rule Checker SQMlint Compiler/Assembler MISRA C Rule Checker (option)
 Renesas
E8a Emulator On-Chip Debugging Emulator for R8C, M16C, H8S, H8 and 740 families. E8a is also used as a device programmer for Renesas microcomputers. This product is E8 emulator's successor. Renesas
High-performance Embedded Workshop IDE and Coding Tool Renesas integrated development environment (IDE) (for SuperH, RX, R8C, M32R, M16C, H8SX, H8S, H8, and 740 families).
 Renesas
Flash Development Toolkit (Programming GUI) Programmer (Unit/SW) Flash memory programming software. [Support MCU/MPU and devices: SuperH RISC engine, RX, R8C, M16C, H8SX, H8S, H8, 740] Renesas
Simulator Debugger for M16C Series and R8C Family Simulator Simulator Debugger for M16C/60, M16C/30, M16C/Tiny, M16C/20, M16C/10 Series and R8C Family [Support IDE : High-performance Embedded Workshop] (Note: This product is included in Compiler Package and is not available separately.)
 Renesas