Gadget Renesas

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GR-CITRUS

The tiny GR-CITRUS board enables easier programming with Ruby language. You can develop Ruby code with "Rubic" on a Chrome app. Of course you can program Arduino-like sketches on the Renesas Web compiler and IDE for GR.
By connecting with WA-MIKAN that has an ESP8266 module for Wi-Fi, you can prototype a system using Wi-Fi and micro SD card.


GR-CITRUS (-FULL) GR-CITRUS
Renesas 32-bit RX63N Group MCU is on board.
Compatible pin array with Arduino Pro Mini.
-FULL version comes with long pin sockets for WA-MIKAN connection.
(Photo shows normal version, which has no pin header.)
WA-MIKAN (-FULL) WA-MIKAN
Wi-Fi module "ESP8266" and micro SD socket.
-FULL version comes with pin sockets for GR-CITRUS connection
(Photo shows -FULL version, which comes with pin sockets.)

Pin Map

Specification

Item Description
Microcontroller RX631(R5F5631FDDFP 100pin QFP)
ROM/RAM 2MB/256KB
Data flash 32KB
Main clock 96MHz (internal)
Sub clock 32.768kHz
Operating voltage 3.3V
Board function Reset Switch, 20 expanding pin, User LED 1

Boards Distributor

Under planning outside Japan.

Technical Support

Technical Information
Related Web Site

Twitter

Schematic / Design

Document

Create and Write a Program

Latest Firmware (to run Ruby)

This link provides the latest version of firmware for GR-CITRUS Ruby. To write the firmware to GR-CITRUS, press the reset button on the GR-CITRUS board, wait for it to be recognized as USB memory, and copy the bin file.

How to program

Create sketches on the Web compiler and write programs to GR-CITRUS as if it were a USB flash memory. IDE for GR can also be used to do the same processes.

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