SAB80C515A-5 Datasheet, PDF (44/108 Pages) Siemens Semiconductor Group – 8-Bit CMOS Single-Chip Microcontroller Family

On-Chip Peripheral Components
5.3 Fail Save Mechanisms
The SAB 80C515A offers two on-chip peripherals which ensure an automatic ’fail-save’ reaction in
cases where the controller’s hardware fails or the software hangs up:
– Programmable Watchdog Timer (WDT) with variable time-out period from 512 µs to approx.
1.1 seconds at 12 MHz. The SAB 80C515A's WDT is compatible to the SAB 80C515's WDT,
which is not programmable.
– An Oscillator Watchdog (OWD) which monitors the on-chip oscillator and forces the
microcontroller into the reset state if the on-chip oscillator fails. This unit is new in with respect
to the SAB 80C515.
Semiconductor Group
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