JAJSOU6 October 2023 TPS2HCS10-Q1
ADVANCE INFORMATION
The CONFIG/ACTIVE state is where the device stays during normal operation when the outputs are OFF (CONFIG) or ON (ACTIVE). The difference between the two is that in the CONFIG state (with the outputs OFF) all of the registers can be configured. In the ACTIVE state with the outputs ON, the parallel configuration of the channel cannot be changed (PARALLEL_12 bit in the DEVICE_CONFIG register). The configuration registers (especially ones needed for to successfully enable the channel) are expected to be written to before the outputs can be turned ON, when transitioning from the SLEEP state (and all the registers are lost). However, the configuration registers are retained while in the LPM state and so the device does not need to be reconfigured while tranisitioning from the LPM state to the ACTIVE state. The quiescent current for VBB, IQVBB, and VDD, IQVVD is higher than in other states to support the load and device diagnostics. SPI communication and diagnostics check is fully supported in this state.
The device can be transitioned into the CONFIG state from the SLEEP state by the CSN pin going low (a dummy SPI command serves this purpose). The device completes the transition through all initializations and functional safety checks. The device transitions to and from the LIMP HOME state depending on the internal SPI watchdog monitor and the status of the LHI input pin. The device can transition into and out of the LPM state by a write to the LPM register.