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R8C/20

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16-bit Microcontrollers with R8C CPU Core (Non Promotion)

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Overview

The R8C/20 Group is supported only for customers who have already adopted these products.

These MCUs are fabricated using the high-performance silicon gate CMOS process, embedding the R8C/ Tiny Series CPU core, and is packaged in a 20-pin molded-plastic LSSOP, SDIP or a 28-pin plastic molded HWQFN. It implements sophisticated instructions for a high level of instruction efficiency. With 1Mb of address space, they are capable of executing instructions at high speed. Furthermore, the R8C/1B Group has on-chip data flash ROM (1KB × 2 blocks). The difference between the R8C/1A Group and R8C/1B Group is only the presence or absence of data flash ROM. Their peripheral functions are the same.

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Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.

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Resources

Support Communities

  1. Controlling 8 R/C Servos with an R8C/20

    I figured out how to use output compare mode of the timers RD to get eight pulse outputs in the range needed by standard R/C servos...  you can only do up to 6 with the PWM modes.void __attribute__((interrupt))timer_rd0_handler(){  /* Read and clear the ...

    Dec 6, 2012
  2. Two more R8C projects...

    Two more R8C projects...

    Nov 30, 2007
  3. where to start learning energy meter (single phase ) using R8C36

    ..HI all  how to understand the logic of the program for energy meter?/there are so many functions declerations etc etc ...i want to know the program flow .can i get flow chart for this program??

    Oct 16, 2009
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FAQs

  1. (R8C) Are there any hardware precautions for accurate A/D conversion?

    In order to perform A/D conversion, it is necessary to fully charge the internal capacitor, but if the impedance of the A/D conversion target is high, the discharge and charge will take time and the conversion value will not be accurate. For correct A/D ...

    Jun 19, 2006
  2. Do I need to rewrite the boot ROM area using MI6C Flash Starter?

    Rewriting of the boot ROM area is unnecessary. This is because M3A-0806 performs programming using the standard boot program which was programmed into the boot ROM area when it was shipped. (#104963)

    Mar 1, 2005
  3. Please tell me how to set the option function register in detail.

    There are three methods for setting the option function select register using the C complier package M3T-NC30WA: Using the load module converter (lmc30 -R8C) -OFSREGX (or -PROTECTX) option Using assembler directive command .OFSREG (or .PROTECT) By assembly programming The load module converter option and directive command depend on the ...

    Mar 13, 2009
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