TJA1054A IO Voltage Level Reference: Is It VCC, VBAT, or Another Source?

NXP TJA1054A's Vio level by what source?

VBAT? VCC?

Is IO level VBAT level? Or using level shfter? or Volt divide?

please reply for my question.

i attached file

TJA1054A(Fault-tolerant CAN transceiver)