[141] NFCT: HFCLK not stopped when entering SENSE mode

This anomaly applies to IC Rev. Engineering C, build codes QFAA-BB0, CIAA-BA0.

Symptoms

Higher current consumption than specified in SENSE mode.

Conditions

Going from active mode to SENSE mode.

Consequences

Higher current consumption in SENSE mode than specified.

Workaround

Power cycle the NFCT executing the following code:

*(volatile uint32_t *)0x40005FFC = 0; 
*(volatile uint32_t *)0x40005FFC = 1; 
Then issue the SENSE task to enter SENSE mode.