The RXD pin is the output to the processor from the CAN bus. When a wake event takes place, this pin is pulled low by default. The wake up action can be changed to pulse by setting register 8'h12 = 1b, RXD_WK_CONFIG. Upon power up, the RXD pin is pulled low as the device has entered standby mode. The RXD pin has an internal 60 kΩ pull-up to VIO that is active when VSUP ≤ UVSUP, POR or when the device is in sleep mode.