The controller-to-controller loopback connection is selected using the MIO_Bank2_Loopback [CAN0_LOOP_CAN1] control bit. When the [CAN0_LOOP_CAN1] is set = 1, these connections are made:
- CAN0 TX output is connected to the CAN1 RX input
- CAN1 TX output is connected to the CAN0 RX input