[202] POWER: Device does not start up in high voltage mode

This anomaly applies to IC Rev. Rev 1, build codes QIAA-Cx0, CKAA-Cx0.

It was inherited from the previous IC revision Engineering C nRF52840.

Symptoms

Device does not start up in high voltage mode.

Conditions

Using REG0 and external circuitry supply or slow rise time on VDDH. Power on reset (POR) may not release correctly.

Consequences

Device does not start up when it should.

Workaround

Do not draw current from VDD pin (external circuitry supply) during power up and ensure VDDH rise time to 3 V is below 1 ms.