Flash download for nRf51822 failed

Question

Hello,
when using Keil's ULINK Pro debugger V1.57 connected to PCA10006 board for debugging nRF51822 code the ULINK is recognized by µVision V5.1.0.0 but the FW download fails with message "Error: Flash download failed - Cortex M0 "

Håkon Alseth · Accepted Answer

Hi, 
 Could you make sure that your IROM/IRAM settings are set properly for S110 example projects (if you're using those)? The flash algorithm will give you an error if you're trying to flash into the region of the softdevice.

Flash download for nRf51822 failed

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