l99dz80ep STMicroelectronics, l99dz80ep Datasheet - Page 44

• Manufacturer Part Number: l99dz80ep
• Description: Door Actuator Driver
• Manufacturer: STMicroelectronics

Application information
Figure 21. Electrochrome mirror driver with mirror referenced to ECFD for negative discharge
3.22
44/68
Watchdog
The watchdog monitors the µC during normal operation within a nominal trigger cycle of
60ms. The watchdog is triggered by toggling the watchdog bit, which restarts the watchdog
timer (i.e. content of the watchdog trigger bit has to be inverted). If no watchdog bit inversion
has been occurred during the watchdog time-out time T
into resistive-low condition, all power outputs are switched off, the electrochrome driver is
disabled and the device enters standby mode.
Doc ID 18260 Rev 4
WDTO
the H-bridge drivers switch
L99DZ80EP