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Renesas RH850: Flash programming fails

11-Dec-2023

Possible causes and solutions

CPU reset caused by either External Watchdog circuitry or internal CPU watchdog

Disable all reset sources during debugging to resolve the issue. More information is available here


F1H, F1Kx: UMI Error R_FCL_ERR_FLMD0 FLMD0-Pin not at high level. Error code = 0C / 0000

Enabled ICUM prevents access to Flash through PE1. Before any Flash operation, ICUM must be disabled.


P1x-C: UMI Error, R_FAD_ERR_FCUTRNS Transfer to FCU firmware failed

Make sure that ICUM is disabled. 


P1x-C: UMI Error, R_FAD_ERR_CLOCK The CPU clock frequency is incorrect

Refer to this topic. 


Sector/mass erase operation fails

Caused by issues in older winIDEA:  


winIDEA version 9.17.151 and older: A lockbit could be set on code Flash sector that causes UMI error R_FCL_ERR_WRITE Flash write error in that sector.
  1. Enable Disable Lock Bits option in Hardware / Flash device.
  2. Disable Use hash verification.
  3. Perform Mass erase with Hardware / code FLASH device / Mass erase

The DisableLockBits option disables the lock bits before erasing the flash. If this option is disabled and the flash sectors are locked, the erase operation fails.


Check this general topic on Flash programming.


More resources:


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