GR-LYCHEE is an Mbed enabled platform which combines the advantages of the Mbed ecosystem and Arduino UNO form factor. GR-LYCHEE include Camera module, Wi-Fi module, and Audio codec as standard equipment.


Important Notice


When you build your Mbed OS 5.9.0 based program with Arm compiler, the resultant binary doesn't work.
It will be revised at Mbed OS 5.9.1. Until then, you need to use Mbed OS 5.8 release branch.
With respect to the concrete way to checkout it, please refer to the following links:

If you import the existing Mbed program on Mbed Online Compiler, please DON'T check Update all libraries to the latest revision in order to prevent Mbed OS from being updated to Mbed OS 5.9 release branch unexpectedly.

  • How to specify the target platform on Mbed online compiler
    Select GR-PEACH, GR-LYCHEE or VK-RZ/A1H and click the Select Platform button shown in the figure below: /media/uploads/1050186/select_platform.png

  • How to specify the target platform on Mbed CLI
    Specify -m RZ_A1H, -m GR_LYCHEE or -m VK_RZ_A1H as the option of Mbed compile command. /media/uploads/1050186/select_platform_cli_peach2.png /media/uploads/1050186/select_platform_cli_lychee.png /media/uploads/1050186/select_platform_cli_vk.png


ArmコンパイラでMbed OS 5.9.0ベースのプログラムをビルドした場合、生成されたバイナリは動作しません。
Mbed OS 5.9.1にて改修予定ですので、それまではMbed OS 5.8のリリースブランチをチェックアウトしてください。
Mbed OS 5.8 リリースブランチのチェックアウト方法に関しましては下記URLを参照ください。

Mbed Online Compilerを使用して既存のMbedプログラムをインポートする場合、意図せずMbed OSがMbed OS 5.9リリースブランチにアップデートされる事を防ぐため、Update all librariesはチェックしないようにしてください。

  • ターゲットプラットフォーム 指定方法(Mbed Online Compiler使用時)
    下図に示す通り、GR-PEACHGR-LYCHEE 又は VK-RZ/A1H をターゲットプラットフォームに追加し、Select Platform ボタンをクリックしてください。 /media/uploads/1050186/select_platform.png

  • ターゲットプラットフォーム 指定方法(Mbed CLI使用時)
    Mbed compileコマンドのオプションに -m RZ_A1H-m GR_LYCHEE 又は -m VK_RZ_A1H を指定してください。 /media/uploads/1050186/select_platform_cli_peach2.png /media/uploads/1050186/select_platform_cli_lychee.png /media/uploads/1050186/select_platform_cli_vk.png


The RZ/A1LU includes an Arm® Cortex™-A9 processor along with the integrated peripheral functions required to configure a system.

The RZ/A1LU includes a 32-Kbyte L1 instruction cache, a 32-Kbyte L1 data cache, and a 128-Kbyte L2 cache. This LSI also includes on-chip peripheral functions necessary for system configuration, such as a 3-Mbyte large-capacity RAM, 128 Kbytes data-retention RAM(shared by the large-capacity RAM), various timer function, realtime clock, serial communication interface(UART), I2C bus interface and graphics related functions etc.

Refer the more information from our website:

/media/uploads/dkato/gr-lychee_p1_2.png /media/uploads/dkato/gr-lychee_p2.png /media/uploads/dkato/gr-lychee_p3.png


  • Renesas RZ/A1LU
    • High performance Arm® Cortex™-A9 Core
      • including NEON and FPU
    • Max 400MHz(It is 384MHz on this board), 3MB On-Chip RAM
    • 32KB Instruction cache, 32 KB Data cache and 128KB L2 cache
    • 2xUSB Host/Device Interface
    • 3xSPI, 4xI2C, 5xUART, 8x12-bits ADC, 2xCAN, 1xLCDC, 1xCamera Input
    • 2xSD, 2xMMC, GPIO
    • 8MB FLASH
    • 2xUSB Host/Device Interface
    • 3xSPI, 3xI2C, 5xUART, 7x12-bits ADC, 2xCAN
    • 1xCamera(VGA 640x480), 1xWi-Fi, 1xAudio(4-pole stereo mini)
    • To be supported
      • 1xLCDC(40pin)
  • Arduino UNO form-factor
    • Compatible with a wide range of commercially available shields
    • Built-in USB drag 'n' drop FLASH programmer


Firmware update



Datasheet of RZ/A1LU


CORE corporation (GR-LYCHEE hardware developer) site

GR-LYCHEE special page in Gadget Renesas Site

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