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Renesas Electronics

R8C » R5F21258

Order Number Distributor Stock    
R5F21258SDFP#V2 Avnet Electronics Marketing 0 ORDER QUOTE
R5F21258SNFP#V2 Avnet Electronics Marketing 0 ORDER QUOTE

Product Overview:

The R8C/25 is based on the R8C/Tiny CPU Core and has 1MB of memory space. Maximum operating frequency is 20MHz. A Flash Memory Version is available. Internal Flash Memory is programmable on a single power source.

Key Features:

  • 8-bit Multifunction Timer with 8-bit prescaler (Timer RA and RB): 2 channels
  • Input Capture/Output Compare Timer (Timer RD): 16-bit x 2 channels
  • Real-Time Clock Timer with compare match function (Timer RE): 1 channel
  • UART/Clock Synchronous Serial Interface: 2 channels
  • I2C-bus™ Interface (IIC)/Chip-select Clock Synchronous Serial Interface (SSU): 1 channel
  • LIN Module: 1 channel (Timer RA, UART0)
  • 10-bit A/D Converter: 12 channels
  • Watchdog Timer
  • Clock Generating Circuits: XIN Clock Generation Circuit, On-chip Oscillator (High/Low Speed), Sub Clock Generation Circuit
  • Oscillation Stop Detection Function
  • Voltage Detection Circuit
  • Power-On Reset Circuit
  • I/O Ports: 41 (incl. LED drive ports)
  • Interrupts: 11 internal factors, 5 external factors, 4 software factors
  • Data Flash: 2KB

I2C-bus™: I2C is a trademark of Philips Semiconductors Corporation.

Key Applications:

Home Appliances, Office Equipment, Audio, Consumer Products

Hardware Manuals


Development Kits etc.

Provider Tool name Order Number
Renesas Electronics Starter Kit for R8C/25 R0K521256S000BE
Renesas Electronics Evaluation Kit for the R8C/35C Microcontroller R0K521350S000BE

IDEs (Compilers etc.)

Provider Tool name Order Number
Renesas Electronics Dev IDE & C Compiler H8 1User YRTA-HEWH8-1UL
IAR Systems Embedded Workbench for Renesas H8 EWH8


Provider Tool name Order Number
Renesas Electronics Compact Emulator R8C/24/25 R0E521258CPE00
Renesas Electronics E8a Emulator R0E00008AKCE00
Renesas Electronics R0E521000CPE00 Compact Emulator R0E521000CPE00
Renesas Electronics R0E521000EPB00 - Emulation Probe R0E521000EPB00
Renesas Electronics E100 Emulator R0E530640MCU00

Operating Systems

Provider Tool name Order Number
CMX Systems CMX-Tiny+ RTOS CMX-Tiny
CMX Systems CMX-RTX, preemptive, multi-tasking RTOS CMX-RTX
Micrium μC/OS-II KRN-K2XX-PKG000-P-P1-A
SEGGER Microcontroller embOS (Real Time Operating System) 1.xx.xx

Stacks/Protocols/File systems

Provider Tool name Order Number
CMX Systems CMX TCP/IP is a full-featured and fast TCP/IP stack CMX-TCP/IP
CMX Systems CMX-MicroNet is a very small and fast TCP/IP stack CMX-MicroNet
SEGGER Microcontroller emWin (Graphics Software and GUI) 3.xx.xx
SEGGER Microcontroller emUSB (Embedded USB Stack) 9.xx.xx
SEGGER Microcontroller emFile (Embedded File System) 2.xx.xx
SEGGER Microcontroller embOS/IP (TCP/IP Stack) 7.xx.xx


Provider Tool name Order Number
Xeltek SuperPro 5004GP Programmer SuperPro 5004GP
Xeltek SuperPro 5000 Programmer SuperPro 5000
SEGGER Microcontroller Flasher 5 5.05.01 FLASHER 5

General Accessories

Provider Tool name Order Number
Renesas Electronics Dev Emulator Accessory-4M SRAM HS6000EMS12H