C515A Datasheet, PDF (39/58 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

C515A
EWPD
(PCON1.0)
P3.2 / INT0 _Control
Logic
RC
Oscillator
XTAL1
On-Chip
XTAL2 _Oscillator
Start /
Stop
f _RC
3 MHz
Start /
Stop
Power-Down
Mode Activated
Control
Logic
Power-Down Mode
Wake-Up Interrupt
Internal Reset
5
f₁
Frequency
Comparator
f₂
f₂<f₁
Delay
OWDS
2
>1
IP0 (A9_H )
Int. Clock
MCB03251
Figure 18
Block Diagram of the Oscillator Watchdog
Semiconductor Group
39
1997-10-01