ZHCSKL7 December 2019 – December 2019 TCAN1044V
PRODUCTION DATA.
The TCAN1044V has internal pull-ups on critical pins which place the device into known states if the pin floats. This internal bias should not be relied upon by design though, especially in noisy environments, but instead should be considered a failsafe protection feature.
When a CAN controller supporting open drain outputs are used an adequate external pull-up resistor must be used to ensure that the TXD output of the CAN controller maintains adequate bit timing to the input of the CAN transceiver. SeeTable 12 for details on pin bias conditions.
| Pin | Pull-up or Pull-down | Comment |
|---|---|---|
| TXD | Pull-up | Weakly biases TXD towards recessive to prevent bus blockage or TXD DTO triggering |
| STB | Pull-up | Weakly biases STB towards low-power standby mode to prevent excessive system power |