Errata nRF52832 - NFCT: HFCLK not stopped when entering SENSE mode

This anomaly applies to Revision 1, build codes QFAA-Bx0, CIAA-Bx0, QFAB-Bx0.

It was inherited from the previous IC revision Engineering C.

Symptoms

Higher current consumption than specified in SENSE mode.

Going from active mode to SENSE mode.

Higher current consumption in SENSE mode than specified.

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.