UM10503
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© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
1257 of 1441
NXP Semiconductors
UM10503
Chapter 45: LPC43xx/LPC43Sxx C_CAN
Table 1060.CAN message interface message control registers (IF2_MCTRL, address
0x400E 2098 (C_CAN0) and 0x400A 4098 (C_CAN1)) bit description
Bit
Symbol
Value
Description
Reset
value
Access
3:0
DLC3_0
Data length code
Remark:
The Data Length Code of a Message
Object must be defined the same as in all the
corresponding objects with the same identifier at
other nodes. When the Message Handler stores
a data frame, it will write the DLC to the value
given by the received message.
0000 to 1000 = Data frame has 0 - 8 data bytes.
1001 to 1111 = Data frame has 8 data bytes.
0000
R/W
6:4
-
reserved
-
-
7
EOB
End of buffer
0
R/W
0
Message object belongs to a FIFO buffer and is
not the last message object of that FIFO buffer.
1
Single message object or last message object of
a FIFO buffer.
8
TXRQST
Transmit request
0
R/W
0
This message object is not waiting for
transmission.
1
The transmission of this message object is
requested and is not yet done
9
RMTEN
Remote enable
0
R/W
0
At the reception of a remote frame, TXRQST is
left unchanged.
1
At the reception of a remote frame, TXRQST is
set.
10
RXIE
Receive interrupt enable
0
R/W
0
INTPND will be left unchanged after successful
reception of a frame.
1
INTPND will be set after successful reception of
a frame.
11
TXIE
Transmit interrupt enable
0
R/W
0
The INTPND bit will be left unchanged after a
successful reception of a frame.
1
INTPND will be set after a successful reception
of a frame.
12
UMASK
Use acceptance mask
Remark:
If UMASK is set to 1, the message
object’s mask bits have to be programmed
during initialization of the message object before
MAGVAL is set to 1.
0
R/W
0
Mask ignored.
1
Use mask (MSK[28:0], MXTD, and MDIR) for
acceptance filtering.