User Manual
375
Rev. 1.1
2019-03-18
TLE984xQX
Microcontroller with LIN and Power Switches for Automotive Applications
Watchdog Timer (WDT1)
14
Watchdog Timer (WDT1)
14.1
Features
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, Stop Mode and Debug Mode the WDT1 is disabled.
Functional Features
• Watchdog Timer is operating with a from the system clock (
f
SYS
) independent clock source (
f
LP_CLK
)
• Windowed Watchdog Timer with programmable timing (16, 32, 48, …, 1008ms period) in Active Mode
• Long open window (200 ms) after power-up, reset, wake-up
• Short open window (30 ms) to facilitate Flash programming
• System safety shutdown to Sleep Mode after 5 missed WDT1 services (see
)
• Watchdog is disabled in Debug Mode
• Watchdog cannot be deactivated in Normal Mode
• Watchdog reset is stored in reset status register