Datasheet

STM690A/692A/703/704/802/805/817/818/819 Description
Doc ID 10522 Rev 10 9/43
1.1.5 V
OUT
When V
CC
is above the switchover voltage (V
SO
), V
OUT
is connected to V
CC
through a P-
channel MOSFET switch. When V
CC
falls below V
SO
, V
BAT
connects to V
OUT
.
1.1.6 V
BAT
When V
CC
falls below V
SO
, V
OUT
switches from V
CC
to V
BAT
. When V
CC
rises above V
SO
+
hysteresis, V
OUT reconnects to V
CC
. V
BAT
may exceed V
CC
. Connect to V
CC
if no battery is
used.
1.1.7 E
The input to the chip-enable gating circuit. Connect to ground if unused.
1.1.8 E
CON
E
CON
goes low only when E is low and reset is not asserted. If E
CON
is low when reset is
asserted, E
CON
will remain low for 15 µs or until E goes high, whichever occurs first. In the
disabled mode, E
CON
is pulled up to V
OUT
.
1.1.9 PFI
When PFI is less than V
PFI
or when V
CC
falls below 2.4 V (or V
SO
), PFO goes low;
otherwise, PFO
remains high. Connect to ground if unused.
1.1.10 PFO
When PFI is less than V
PFI
, or V
CC
falls below 2.4 V (or V
SO
), PFO goes low; otherwise,
PFO
remains high. Leave open if unused. Output type is push-pull.