4 Digital Wake Up

Another type of wake available in some SBCs including the TCAN28xx-Q1 and TCAN24xx-Q1 family of mid-range SBC devices is a digital wake up through the software debug (SW) pin. The SW pin on these devices is primarily an input that can be used to prevent the SBC from taking action due to a missed watchdog. However, this pin also has an alternate function as a digital wake input during sleep or fail-safe mode.

The digital wake up function differs depending on the SBC mode. In both cases, either an MCU or wake-capable CAN/LIN transceiver changes the state on the SW pin (either high to low or low to high transitions) to trigger a wake condition for the SBC. For sleep mode, if digital wake is enabled, a state change on the SW pin is enough to trigger a wake on the SBC