The TPS929121-Q1 provides fault masking capability using masking registers. The device is capable of masking faults by channels or by fault types. The fault masking does not disable diagnostics features but only prevents fault reporting to FLAG_OUT register, FLAG_ERR register, and ERR output.

To disable diagnostics on a single channel, setting CONF_DIAGENCHx registers to 0 disables diagnostics of channel x and thus no fault of this channel is reported to FLAG_OUT or FLAG_ERR registers, or to the ERR output.

CONF_MASKREF prevents the reference fault being reported to FLAG_ERR and ERR output.

CONF_MASKOPEN prevents the output open-circuit fault being reported to FLAG_OUT, FLAG_ERR and ERR output.

CONF_MASKSHORT prevents the output short-circuit fault being reported to FLAG_OUT, FLAG_ERR and ERR output.

CONF_MASKTSD prevents the overtemperature shutdown fault being reported to FLAG_ERR and ERR output.

CONF_MASKCRC prevents the CRC fault being reported to FLAG_ERR and ERR output.