34.5.4 Control B

Name: CTRLB
Offset: 0x03
Reset: 0x00
Property: -

Bit 76543210 
    NACKDISCCDETDISUPDIDIS   
Access RRR 
Reset 000 

Bit 4 – NACKDIS Disable NACK Response

Writing this bit to '1' disables the NACK signature sent by the UPDI if a System Reset is issued during an ongoing LD(S) and ST(S) operation.

Bit 3 – CCDETDIS Collision and Contention Detection Disable

If this bit is written to '1', contention detection is disabled.

Bit 2 – UPDIDIS UPDI Disable

Writing a '1' to this bit disables the UPDI PHY interface. The clock request from the UPDI is lowered, and the UPDI is reset. All UPDI PHY configurations and KEYs will be reset when the UPDI is disabled.