ZHCSR22A June 2021 – September 2022 LP876242-Q1
PRODUCTION DATA
ON requests are used to switch on the device, which then transitions the device from the STANDBY or the LP_STANDBY to the state specified by STARTUP_DEST[1:0].
After the device arrives at the corresponding STARTUP_DEST[1:0] operation state, the MCU must setup the NSLEEP1 and NSLEEP2 signals accordingly before clearing the STARTUP_INT interrupt. Once the interrupt is cleared, the device stays or moves to the next state corresponding to the NSLEEP signals state assignment as specified in Table 7-16.
Table 7-13 lists the available ON requests.
| EVENT | MASKABLE | COMMENT | DEBOUNCE | |
|---|---|---|---|---|
| ENABLE (pin) | Yes | Level sensitive | 8 μs | |
| First Supply Detection (FSD) | Yes | VCCA > VCCA_UV and FSD unmasked | N/A | |
| WKUP1 or WKUP2 Detection | Yes | Edge sensitive | 8 μs | |
| Recovery from Immediate and Orderly Shutdown | No | Recover from system errors which caused immediate or orderly shutdown of the device | N/A | |
If one of the events listed in Table 7-13 occurs, then the event powers on the device unless one of the gating conditions listed in Table 7-14 is present.
| EVENT | MASKABLE | COMMENT | ||
|---|---|---|---|---|
| VCCA_OVP (event) | No | VCCA > VCCA_OVP Device stays in SAFE RECOVERY until VCCA < VCCA_OVP | ||
| VCCA_UVLO (event) | No | VCCA < VCCA_UVLO | ||
| VINT_OVP (event) | No | LDOVINT > 1.98 V | ||
| VINT_UVLO (event) | No | LDOVINT < 1.62 V | ||
| TSD (event) | No | Device stays in SAFE RECOVERY until temperature decreases below TWARN level | ||