XC886/888CLM
Controller Area Network (MultiCAN) Controller
User’s Manual
15-57
V1.3, 2010-02
MultiCAN, V1.0
Each Message Pending Register has a Message Index Register MSIDk associated with
it. The Message Index Register shows the active (set) pending bit with lowest bit position
within groups of pending bits.
MSIDk (k = 0-1)
Message Index Register k
Reset Value: 0000 0020
H
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
0
r
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
INDEX
r
rh
Field
Bits
Type Description
INDEX
[5:0]
rh
Message Pending Index
The value of INDEX is given by the bit position i of the
pending bit of MSPNDk with the following properties:
1. MSPNDk[i] & IM[i] = 1
2. i = 0 or MSPNDk[i-1:0] & IM[i-1:0] = 0
If no bit of MSPNDk satisfies these conditions then
INDEX reads 100000
B
.
Thus INDEX shows the position of the first pending bit
of MSPNDk, in which only those bits of MSPNDk that
are selected in the Message Index Mask Register are
taken into account.
0
[31:6]
r
Reserved
Read as 0; should be written with 0.
*