ZHCSO46 December 2021 TCAN1057AEV-Q1
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 | S = VIO: Silent mode | High impedance Weak pull-down to ground(1) | Recessive |
| S = GND: Protected mode | ||||
| > UVVCC | < UVVIO | Protected | High impedance | |
| < UVVCC | < UVVIO | Protected | High impedance |
Once the undervoltage condition is cleared and tMODE has expired the device transitions to normal mode and the host controller can send and receive CAN traffic again.