DCAN Registers
23.4.48 IF3MCTL Register (offset = 14Ch) [reset = 0h]
IF3MCTL is shown in
and described in
Figure 23-66. IF3MCTL Register
31
30
29
28
27
26
25
24
Reserved
R-0h
23
22
21
20
19
18
17
16
Reserved
R-0h
15
14
13
12
11
10
9
8
NewDat
MsgLst
IntPnd
UMask
TxIE
RxIE
RmtEn
TxRqst
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
7
6
5
4
3
2
1
0
EoB
Reserved
DLC
R-0h
R-0h
R-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 23-61. IF3MCTL Register Field Descriptions
Bit
Field
Type
Reset
Description
31-16
Reserved
R
0h
15
NewDat
R
0h
New Data
0x0 = No new data has been written into the data portion of this
message object by the message handler since the last time when
this flag was cleared by the CPU.
0x1 = The message handler or the CPU has written new data into
the data portion of this message object.
14
MsgLst
R
0h
Message Lost (only valid for message objects with direction =
receive)
0x0 = No message lost since the last time when this bit was reset by
the CPU.
0x1 = The message handler stored a new message into this object
when NewDat was still set, so the previous message has been
overwritten.
13
IntPnd
R
0h
Interrupt Pending
0x0 = This message object is not the source of an interrupt.
0x1 = This message object is the source of an interrupt. The
Interrupt Identifier in the interrupt register will point to this message
object if there is no other interrupt source with higher priority.
12
UMask
R
0h
Use Acceptance Mask
0x0 = Mask ignored
0x1 = Use mask (Msk[28:0], MXtd, and MDir) for acceptance
filtering. If the UMask bit is set to one, the message object's mask
bits have to be programmed during initialization of the message
object before MsgVal is set to one.
11
TxIE
R
0h
Transmit Interrupt enable
0x0 = IntPnd will not be triggered after the successful transmission of
a frame.
0x1 = IntPnd will be triggered after the successful transmission of a
frame.
10
RxIE
R
0h
Receive Interrupt enable
0x0 = IntPnd will not be triggered after the successful reception of a
frame.
0x1 = IntPnd will be triggered after the successful reception of a
frame.
3981
SPRUH73H – October 2011 – Revised April 2013
Controller Area Network (CAN)
Copyright © 2011–2013, Texas Instruments Incorporated