Datasheet

Pin descriptions STM6513
8/29 Doc ID 16490 Rev 2
3 Pin descriptions
3.1 Power supply (V
CC
)
This pin is used to provide the power to the Smart Reset device and to monitor the power
supply. A 0.1 µF decoupling ceramic capacitor is recommended to be connected between
V
CC
and V
SS
pins.
3.2 Ground (V
SS
)
This is the ground for the device and all supplies.
3.3 Smart Reset inputs (SR0, SR1)
Push-button Smart Reset inputs. Both inputs need to be held active at the same time for at
least t
SRC
to activate the reset outputs. When only one Smart Reset input is used, connect
the unused one permanently to V
SS
.
3.4 User-programmable Smart Reset delay (TSR pin)
Used to allow the user to program the setup time before the push-buttons action is validated
by reset output. Controlled by different voltage levels on the TSR pin: when connected to
ground, t
SRC
= 2 s; when left open, t
SRC
= 6 s; when connected to V
CC
, t
SRC
= 10 s
(all times are minimum). TSR is a DC-type input, intended to be either permanently
grounded, permanently connected to V
CC
or permanently left open. If left open, for improved
system glitch immunity it is strongly recommended to connect a 0.1 µF decoupling ceramic
capacitor between the TSR and V
SS
pins.
3.5 Reset outputs (RST1, RST2)
Reset outputs, RST1 active-high, push-pull type, RST2 active-low, open-drain.
3.6 Adjustable output reset timeout period input pin (TREC
ADJ
)
The output reset timeout period (t
REC1
) on RST1 is adjustable by connecting an external
capacitor C
tREC
to the TREC
ADJ
pin. Calculated t
REC
and C
tREC
examples are given in
Ta b l e 2 . Refer also to Table 5 .