Datasheet

STM6600, STM6601 Waveforms
Doc ID 15453 Rev 11 19/52
Figure 12. Unsuccessful power-up on STM6601
1. PB detection on falling edge.
2. Internal pull-down resistor 300 kΩ is connected to PS
HOLD
input during power-up.
3. PS
HOLD
signal is ignored during t
ON_BLANK
. When t
ON_BLANK
expires, the level of the PS
HOLD
signal is not high therefore
the
EN signal goes low. Even releasing the PB button after the t
ON_BLANK
will not prevent this.
EN
(3)
(2)
t
ON_BLANK
expires
PS
HOLD
state detected as low
EN deasserted
intenal pull-down resistor
connected to PS
HOLD
input
t
DEBOUNCE
Push-button pressed and
PB connected to GND
Push-button pressed and
PB connected to GND
t
REC
PB
(1)
RST
PS
HOLD
ignored
PS
HOLD
AM00238v2
INT signal is held high during power-up (i.e. until t
ON_BLANK
expires in the case of the STM6601).
V
CC
is considered V
CC
> V
TH+
.
Note: