ZHCSKL7 December 2019 – December 2019 TCAN1044V
PRODUCTION DATA.
The supply pins, VCC and VIO, have undervoltage detection that places the device into a protected state. This protects the bus during an undervoltage event on either supply pin.
| VCC | VIO | Device State | Bus | RXD Pin |
|---|---|---|---|---|
| > UVVCC | > UVVIO | Normal | Per TXD | Mirrors bus |
| < UVVCC | > UVVIO | STB = VIO: Standby mode | Biased to GND | VIO: Remote wake request(1) |
| STB = GND: Protected mode | High impedance | Recessive | ||
| > UVVCC | < UVVIO | Protected | High impedance | High impedance |
| < UVVCC | < UVVIO | Protected | High impedance | High impedance |
Once an undervoltage condition is cleared and the supply has returned to a valid level the TCAN1044V transitions to normal mode after the tMODE time has expired. The host controller should not attempt to send or receive messages until the tMODE time has expired.