ZHCSQ68A May 2022 – December 2022 TLIN1431-Q1
PRODUCTION DATA
Upon power up, the state of this pin determines if it is WKRQ or INH. When externally pulled low with a 100 kΩ resistor, the WKRQ function is enabled which is an active high, digital output supporting the internal voltage rail (VINT) or VCC as described in PIN or nCS (Pin Watchdog Select or SPI Chip Select). When left floating or pulled low by a 1 MΩ resistor, this pin becomes the high voltage inhibit (INH) output which is used to support the enable pin of a power device. If a capacitor to ground is used off of this pin, it must be less than or equal to 50 pF. When WKRQ is selected, the pin behavior is based off of the LDO, so any event that causes the LDO to be turned off will turn off the WKRQ pin.