9.3.3 CAN Bus States

The CAN bus has two states during powered operation of the device: dominant and recessive. A dominant bus state is when the bus is driven differentially, corresponding to a logic low on the D and R pin. A recessive bus state is when the bus is biased to V_CC / 2 through the high-resistance internal input resistors R_IN of the receiver, corresponding to a logic high on the D and R pins (see Figure 25 and Figure 26).

Figure 25. Bus States (Physical Bit Representation)

Figure 26. Simplified Recessive Common Mode Bias and Receiver