WDI
V
CC
WATCHDOG
TRANSITION
DETECTOR
WATCHDOG
TIMER
WDO
250µA
MR
TIMEBASE FOR
RESET AND
WATCHDOG
RESET
GENERATOR
RESET/RESET*
V
CC
4.65V
(4.40V for the SP706 and SP813M)
PFI
PFO
1.25V
SP705
SP706
SP813L
SP813M
GND
* For the SP813L/813M only
Figure 2. Internal Block Diagram for the SP705/706/813L/813M
V
CC
RESET
250µA
MR
RESET
GENERATOR
RESET
V
CC
4.65V
(4.40V for the SP708)
PFI
PFO
1.25V
SP707
SP708
GND
Figure 3. Internal Block Diagram for the SP707/708
SP705DS/09
SP705 Low Power Microprocessor Supervisory Circuits
© Copyright 2000 Sipex Corporation
5