FUJITSU F2MCTM-16LX - Manual (Page 494)

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CHAPTER 21 CAN CONTROLLER
■ Register Function
Notes:
• AMSx.1 and AMSx.0 should be set when the message buffer (x) is invalid (BVALx of the message
buffer valid register (BVALR) is 0). Setting when the buffer is valid (BVALx = 1) may cause
unnecessary received messages to be stored.
• To invalidate the message buffer (by setting the BVALR: BVAL bit to 0) while the CAN controller is
operating for CAN communication (the read value of the CSR: HALT bit is 0 and the CAN controller is
operating for CAN bus communication to enable transmission and reception), follow the procedure in
"21.13 Precautions when Using CAN Controller".
Table 21.4-7 Selection of Acceptance Mask
AMSx.1 AMSx.0 Acceptance Mask
0 0 Full-bit comparison
0 1 Full-bit mask
1 0 Acceptance mask register 0 (AMR0)
1 1 Acceptance mask register 1 (AMR1)