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How to update firmware for GR PEACH


This page is for GR-PEACH rev.E and GR-PEACH rev.C.
If your GR-PEACH is rev.B, go to Information of GR-PEACH rev.B. To identify GR-PEACH revision, see here.


You usually do not need to update the firmware of CMSIS-DAP. CMSIS-DAP is debugging function done by NXP device on the Mbed board(GR-PEACH) and the firmware is downloaded into it. So, it's different from RZ/A1H software(firmware).

How to Update the firmware for GR-PEACH

0. Preparation
Download a firmware from the following URL.

  • Latest version
    grpeach_8mb_20161212.bin (DAPLink)
    • Synchronized with git revision 99222da7031f4fa3f91c8fcf2a34b604327e751f.
    • To update the firmware on a device by attaching USB while hold Reset button.

  • old version
    grpeach_8mb_20150601.bin (CMSIS-DAP)
    • Support drag-and-drop writing on OS X Yosemite.
    • Support the binary files of size larger than 512 kilobytes.
  1. Connect GR-PEACH to PC
    Please make a short-circuit at JP2 when you connect USB cable between GR-PEACH and PC.
    rev C step1
  2. After the connection, it will appear as a disk called "CRP DISABLED".
    If "mbed" appears, the short-circuit of JP2 doesn't succeed.
    In this case, please re-try the previous item.
    When GR-PEACH connected as "CRP DISABLED", JP2 can be opened during firmware updating.
  3. Open the "CRP DISABLED" disk folder and delete the Firmware.bin. (Please check the following Note.)
  4. Copy the downloaded file to this drive. (Please check the following Note.)


For Mac user: please check the following URL instead of step 3 and 4.
: Refer here

5. Disconnect between GR-PEACH and PC after copy is finished.
6. Reconnect GR-PEACH and PC.
7. When USB disk appears as "mbed", firmware update is finished.

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