Ide Register (Ider) - Fujitsu F2MCTM-16LX Hardware Manual

CHAPTER 21 CAN CONTROLLER
21.4.10

IDE Register (IDER)

This register stores the frame format used by the message buffers (x) during
transmission/reception.
Register Configuration
Address
CAN1: 007D09
Address
CAN1: 007D08
R/W : Read/Write
X : Undefined
Register Function
0: The standard frame format (ID11 bit) is used for the message buffer (x).
1: The extended frame format (ID29 bit) is used for the message buffer (x).
Notes:
• This register should be set when the message buffer (x) is invalid (BVALx of the message buffer valid
register (BVALR) = 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".
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Figure 21.4-10 Configuration of the IDE Register (IDER)
bit15 bit14 bit13
IDE15 IDE14 IDE13
H
R/W R/W R/W
bit7 bit6 bit5
IDE7 IDE6 IDE5
H
R/W R/W R/W
bit12 bit11 bit10
IDE12 IDE11 IDE10 IDE9
R/W R/W R/W R/W
bit4 bit3 bit2
IDE4 IDE3 IDE2 IDE1
R/W R/W R/W R/W
bit9 bit8 IDER1(upper)
IDE8 Reset value
XXXXXXXX
R/W
bit1 bit0 IDER1(Lower)
IDE0 Reset value
XXXXXXXX
R/W
B
B