There are internal pull ups on critical terminals to place the device into known states if the terminal floats. See Table 10-7 for details on terminal bias conditions.
|TERMINAL||PULL UP or PULL DOWN||COMMENT|
|SCLK||Pull up||Weakly biases input|
|SDI||Pull up||Weakly biases input|
|nCS||Pull up||Weakly biases input so the device is not selected|
|RXD||Pull up||Active when CAN transceiver is off.|
|TXD||Pull up||Weakly biases input|