SLVSFZ4A December 2020 – February 2021 TPS929121-Q1
PRODUCTION DATA
The TPS929121-Q1 has a unique programmable output failure state. If there is a failure detected in fail-safe states, the TPS929121-Q1 automatically goes into OUTFAIL state. The EEPROM register EEP_OFAF determines whether the result behavior of output failure is one-fails-all-fail or one-fails-others-on.
As different channels may serve different functions, diagnostics requirements are different as well. CONF_DIAGENCHx is able to control diagnostics for every channel. For channels that requires one-fails-all-fail with ERR pin as the fault bus, the fault enable register CONF_DIAGENCHx must be set to 1 and EEP_OFAF to 1. For channels that requires one-fails-others-on in fail-safe states, the fault enable register CONF_DIAGENCHx must be set 1 and EEP_OFAF to 0. In case the channel diagnostics is not needed, set the CONF_DIAGENCHx to 0. Details as described in Table 8-5. The register CONF_DIAGENCHx automatically loads the code from EEPROM register EEP_DIAGENCHx as well as other configuration registers every time entering fail-safe state.