Datasheet

Waveforms STM6600, STM6601
18/52 Doc ID 15453 Rev 11
Figure 11. Successful 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 high therefore the
EN signal remains asserted.
PB status and V
CC
undervoltage
ignored
PB
(1)
EN
(3)
RST
Push-button pressed and
PB connected to GND
t
DEBOUNCE
t
REC
processor
sets PS
HOLD
detection
t
ON_BLANK
PS
HOLD
ignored
t
ON_BLANK
expires
PS
HOLD
state detected as high
EN remains asserted
(2)
internal pull-down resistor
connected to PS
HOLD
input
PS
HOLD
AM00250v2
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: