TX=CONTROLLER, LBACK=DISABLED, BASIC=DISABLED, RX=RECESSIVE, SILENT=NORMAL_OPERATION
Test register
| RESERVED | Reserved |
| BASIC | Basic mode 0 (DISABLED): Disabled. Basic mode disabled. 1 (ENABLED): Enabled. IF1 registers used as TX buffer, IF2 registers used as RX buffer. |
| SILENT | Silent mode 0 (NORMAL_OPERATION): Normal operation. 1 (SILENT_MODE): Silent mode. The module is in silent mode. |
| LBACK | Loop back mode 0 (DISABLED): Disabled. Loop back mode is disabled. 1 (ENABLED): Enabled. Loop back mode is enabled. |
| TX | Control of CAN_TXD pins 0 (CONTROLLER): Controller. Level at the CAN_TXD pin is controlled by the CAN controller. This is the value at reset. 1 (SAMPLE_POINT): Sample point. The sample point can be monitored at the CAN_TXD pin. 2 (LOW): Low. CAN_TXD pin is driven LOW/dominant. 3 (HOGH): Hogh. CAN_TXD pin is driven HIGH/recessive. |
| RX | Monitors the actual value of the CAN_RXD pin. 0 (RECESSIVE): Recessive. The CAN bus is recessive (CAN_RXD = 1). 1 (DOMINANT): Dominant. The CAN bus is dominant (CAN_RXD = 0). |
| RESERVED | R/W |