ZHCSGQ0A September 2017 – February 2022 TIC10024-Q1
PRODUCTION DATA
Microcontroller can toggle the RESET pin to perform a hardware reset to the device. The RESET pin is internally pulled-down by a resistor (1.25MΩ typical) and must be kept low for normal operation. When the RESET pin is toggled high, the device enters the reset state with most of the internal blocks turned off and consumes very little current of IS_RESET. Switch monitoring and SPI communications are stopped in the reset state, and all register contents are cleared. When RESET pin is toggled back low, all the registers are set to their default values and the device state machine is re-initialized, similar to a POR event. When the re-initialization process is completed the INT pin is asserted low, and the interrupt register bit POR and the SPI status flag POR are both asserted to notify the microcontroller that the device has completed the reset process.
Note in order to successfully reset the device, the RESET pin needs to be kept high for a minimum duration of tRESET. The pin is required to be driven with a stable input (below VRESET_L for logic low or above VRESET_H for logic H) to prevent the device from accidental reset.