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UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
1079 of 1269
NXP Semiconductors
UM10503
Chapter 42: LPC43xx C_CAN
5
ARB
Access arbitration bits
0
R/W
0
Arbitration bits unchanged.
1
Transfer Identifier, DIR, XTD, and MSGVAL
bits to IFx message buffer register.
6
MASK
Access mask bits
0
R/W
0
Mask bits unchanged.
1
Transfer Identifier MASK + MDIR + MXTD to
IFx message buffer register.
7
WR_RD
0
Read transfer
Transfer data from the message object
addressed by the command request register
to the selected message buffer registers
CANIFn_CMDREQ.
0
R/W
31:8
-
-
reserved
0
-
Table 947. CAN message interface command mask registers read direction
(IF2_CMDMSK_R, address 0x400E 2084 (C_CAN0) and 0x400A 4084 (C_CAN1)) bit
description
Bit
Symbol
Value
Description
Reset
value
Access
0
DATA_B
Access data bytes 4-7
0
R/W
0
data bytes 4-7 unchanged.
1
Transfer data bytes 4-7 to IFx message buffer
register.
1
DATA_A
Access data bytes 0-3
0
R/W
0
data bytes 0-3 unchanged.
1
Transfer data bytes 0-3 to IFx message
buffer.
2
NEWDAT
Access new data bit
0
R/W
0
NEWDAT bit remains unchanged.
Remark:
A read access to a message object
can be combined with the reset of the control
bits INTPND and NEWDAT in IF1/2_MCTRL.
The values of these bits transferred to the IFx
Message Control Register always reflect the
status before resetting these bits.
1
Clear NEWDAT bit in the message object.
3
CLRINTPND
Clear interrupt pending bit.
0
R/W
0
INTPND bit remains unchanged.
1
Clear INTPND bit in the message object.
4
CTRL
Access control bits
0
R/W
0
Control bits unchanged.
1
Transfer control bits to IFx message buffer.
Table 946. CAN message interface command mask registers read direction
(IF1_CMDMSK_R, address 0x400E 2024 (C_CAN0) and 0x400A 4024 (C_CAN1)) bit
description
…continued
Bit
Symbol
Value
Description
Reset
value
Access