DCAN Registers
23.4.27 MSGVAL56 Register (offset = CCh) [reset = 0h]
MSGVAL56 is shown in
and described in
.
These registers hold the MsgVal bits of the implemented message objects. By reading out these bits, the
CPU can check which message objects are valid. The MsgVal bit of a specific message object can be
set/reset by the CPU via the IF1/IF2 interface register sets, or by the message handler after a reception or
a successful transmission.
Figure 23-45. MSGVAL56 Register
31
30
29
28
27
26
25
24
MsgVal[96:81]
R-0h
23
22
21
20
19
18
17
16
MsgVal[96:81]
R-0h
15
14
13
12
11
10
9
8
MsgVal[80:65]
R-0h
7
6
5
4
3
2
1
0
MsgVal[80:65]
R-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 23-40. MSGVAL56 Register Field Descriptions
Bit
Field
Type
Reset
Description
31-16
MsgVal[96:81]
R
0h
Message valid bits (for all message objects)
0x0 = This message object is ignored by the message handler.
0x1 = This message object is configured and will be considered by
the message handler.
15-0
MsgVal[80:65]
R
0h
Message valid bits (for all message objects)
0x0 = This message object is ignored by the message handler.
0x1 = This message object is configured and will be considered by
the message handler.
3953
SPRUH73H – October 2011 – Revised April 2013
Controller Area Network (CAN)
Copyright © 2011–2013, Texas Instruments Incorporated