TLE9869QXA20_15 Datasheet, PDF (42/122 Pages) Infineon Technologies AG – Microcontroller with LIN and H-Bridge MOSFET Driver for Automotive Applications

13
Watchdog Timer (WDT1)
TLE9869QXA20
Watchdog Timer (WDT1)
13.1
Features
There are two watchdog timers in the system. The Watchdog Timer (WDT) within the System Control Unit - Digital
Modules (see SCU_DM) and the Watchdog Timer (WDT1) located within the System Control Unit - Power
Modules (see SCU_PM). The Watchdog Timer WDT1 is described in this section.
In Active Mode, the WDT1 acts as a windowed watchdog timer, which provides a highly reliable and safe way to
recover from software or hardware failures.
The WDT1 is always enabled in Active Mode. In Sleep Mode, Low Power Mode and SWD Mode the WDT1 is
automatically disabled.
Functional Features
• Windowed Watchdog Timer with programmable timing in Active Mode
• Long open window (typ. 80ms) after power-up, reset, wake-up
• Short open window (typ. 30ms) to facilitate Flash programming
• Disabled during debugging
• Safety shutdown to Sleep Mode after 5 missed WDT1 services
Data Sheet
42
Rev. 1.0, 2015-04-30