STM6600 Datasheet, PDF (15/51 Pages) STMicroelectronics – Smart push-button on/off controller with Smart ResetTM and power-on lockout

STM6600 - STM6601
Waveforms
Figure 8. Successful power-up on STM6600 (t_{ON_BLANK} expires prior to PB release)
Push-button pressed and
PB connected to GND
processor
sets PS_HOLD
t_{ON_BLANK} expired prior to PB
release
PS_HOLD state detected as high
EN remains asserted
PB released
PB⁽¹⁾
PS_HOLD(2)
V_CC undervoltage detection
ignored
PS_HOLD
ignored
internal pull-down resistor
connected to PS_HOLD input
EN⁽³⁾
RST
t_DEBOUNCE
t_REC
t_{ON_BLANK}
Note: INT signal is held high during power-up (i.e. until t_{ON_BLANK} expires in this case).
V_CC is considered V_CC > V_TH+.
1. PB detection on falling and rising edges.
2. Internal pull-down resistor 300 kΩ is connected to PS_HOLD input during power-up.
3. t_{ON_BLANK} expires prior to PB release so PS_HOLD is checked at its expiration.
AM00247bv2
Doc ID 15453 Rev 7
15/51