SAB80C515A-5 SIEMENS [Siemens Semiconductor Group], SAB80C515A-5 Datasheet - Page 51

• Manufacturer Part Number: SAB80C515A-5
• Description: 8-Bit CMOS Single-Chip Microcontroller Family
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Detailed Description of the Oscillator Watchdog Unit
Figure 5-8 shows the block diagram of the oscillator watchdog unit. It consists of an internal RC
oscillator which provides the reference frequency for the comparison with the frequency of the on-
chip oscillator.
Figure 5-8
Oscillator Watchdog Unit
Special Function Register IP0 (Address 0A9 H )
Bit No.
Bit
OWDS
Reset value of IP0 is 00 H .
Semiconductor Group
086 H
OWDS
MSB
7
These bits are not used for Watchdog Timer
WDTS
6
Function
Oscillator watchdog timer status flag.
Set by hardware when an oscillator watchdog reset occurred. Can be
cleared and set by software.
IP0.5
5
IP0.4
4
5-18
IP0.3
3
On-Chip Peripheral Components
IP0.2
2
IP0.1
1
IP0.0
LSB
0
IPO