ZHCSIP6D August 2019 – March 2025 TCAN1044-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 | DEVICE STATE | BUS | RXD PIN |
|---|---|---|---|
| > UVVCC | Normal | Per TXD | Mirrors bus |
| < UVVCC | Protected | High impedance Weak pull-down to ground(1) | High impedance |
| VCC | VIO | DEVICE STATE | BUS | RXD PIN |
|---|---|---|---|---|
| > UVVCC | > UVVIO | Normal | Per TXD | Mirrors bus |
| < UVVCC | > UVVIO | STB = VIO: standby mode | High impedance Weak pull-down to ground(1) | VIO: Remote wake request(2) |
| STB = GND: Protected | Recessive | |||
| > UVVCC | < UVVIO | Protected | High impedance | |
| < UVVCC | < UVVIO | Protected | High impedance |
Once the undervoltage condition is cleared and tMODE has expired the TCAN1044-Q1 transitions to normal mode and the host controller can send and receive CAN traffic again.