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NRF52_DK 2.0.0 interface MCU MBED FW problem

Hi all,

i've try to update the NRF52_DK interface MCU firmware to MBED firmware (nrf5x_atsam3u2c_if_mbed_V0221_11012017.bin).

After power cycle, LD5 at interface MCU blinking, the hardware does not answer. 

I tried to update to 0253_SAM3U2C_MKIT_DK_DONGLE_NRF5X_0X5000.BIN at https://armmbed.github.io/DAPLink/ but it is failed too.

When i try to update to JLink firmware, it is working, but the MBed Studio not allow debugging via PyOCD.

The previous version of NRF52_DK (1.2.0) works fine with both of MBed interface firmware. 

Is there any update for 2.0.0 board to enable MBed?

Thank you, best regards,

David