Datasheet

C515C
Data Sheet 55 2003-02
Figure 24 Block Diagram of the Oscillator Watchdog
OWDS
1
IP0 (A9 )
Frequency
Comparator
Delay
f
2
<
1
f
f
1
2
f
Internal
Clock
On-Chip
Oscillator
Oscillator
RC
RC
f
3 MHz
MCB02757
H
Start/
Stop
Stop
Start/
Control
Logic
XTAL1
XTAL2
P3.2/
INT0
Logic
Control
EWPD
(PCON1.7) Mode Activated
Power-Down
Power-Down Mode
Wake-Up Interrupt
Reset
Internal
÷5÷2
_
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