Datasheet

STM705, STM706, STM707, STM708, STM813L Pin descriptions
Doc ID 10520 Rev 9 9/33
2.7 PFO
When PFI is less than V
PFI
, PFO goes low; otherwise, PFO remains high. Leave open if
unused. Output type is push-pull.
Figure 7. Block diagram (STM705/706/813L)
1. For STM813L only.
Table 3. Pin description
Pin
Name Function
STM813L
STM707
STM708
STM705
STM706
1 1 1 MR
Push-button reset input
6 — 6 WDI Watchdog input
8 — 8 WDO Watchdog output (push-pull)
— 7 7 RST
Active-low reset output
7 8 RST Active-high reset output
2 2 2 V
CC
Supply voltage
4 4 4 PFI Power-fail input
5 5 5 PFO Power-fail output (push-pull)
3 3 3 V
SS
Ground
— 6 — NC No connect
AI08829
WATCHDOG
TIMER
V
RST
WDI
transitional
detector
COMPARE
COMPARE
t
rec
generator
V
PFI
V
CC
V
CC
PFI
MR
WDI
RST (RST)
(1)
PFO
WDO