Fujitsu MB96300 series Hardware Manual page 608

CHAPTER 22 CAN CONTROLLER
22.6.2 IFx Command Mask Register (IFxCMSKn)
The control bits of the IFx Command Mask Register (IFxCMSKn) specify the transfer
direction and select which of the IFx Message Buffer Registers are source or target of the
data transfer.
■ IFx Command Mask Register (IFxCMSKn)
Figure 22.6-2 Configuration of the IFx Command Mask Register (IFxCMSKn)
IFx Command Mask Register high byte15
Address (x = 1): CANn base + 0x13
(x = 2): CANn base + 0x43
IFx Command Mask Register low byte
Address (x = 1): CANn base + 0x 12
(x = 2): CANn base + 0x 42
■ Function of the IFx Command Mask Register (IFxCMSKn)
[bit15-bit8] res
[bit7] WRRD
0
1
The other bits of IFx Command Mask Register have different functions depending on the transfer direction:
■ Direction = Write
[bit6] MASK
0
1
[bit5] ARB
0
1
[bit4] CONTROL
0
600
14
H
res res
H
Read/write ⇒
(R) (R)
(X) (X)
Default value⇒
7
H
WRRD MASK
H
(R/W) (R/W) (R/W) (R/W) (R/W) (R/W)
Read/write ⇒
(0)
Default value⇒
Reserved Bits
Always write "0". Read value is not defined. Read-Modify-Write is not affected.
Write / Read
Read: Transfer data from the Message Object addressed by the Command Request Register into the selected
Message Buffer Registers.
Write: Transfer data from the selected Message Buffer Registers to the Message Object addressed by the Com-
mand Request Register.
Access Mask Bits
Mask bits unchanged.
Transfer Identifier Mask + MDir + MXtd to Message Object.
Access Arbitration Bits
Arbitration bits unchanged.
Transfer Identifier + Dir + Xtd + MsgVal to Message Object.
Access Control Bits
Control Bits unchanged.
MB96300 Super Series Hardware Manual
13 12 11 10
res res res res
(R) (R) (R) (R)
(X) (X) (X) (X)
6 5 4 3
ARB CIP
CONTROL
(0) (0) (0) (0)
⇐ Bit no.
9 8
res res IFxCMSKHn
(R) (R)
(X) (X)
⇐ Bit no.
1
2 0
TXREQ DATAA DATAB
IFxCMSKLn
(R/W) (R/W)
(0)
(0) (0)