TC1796
Peripheral Units (Vol. 2 of 2)
Controller Area Network (MultiCAN) Controller
User’s Manual 22-71 V2.0, 2007-07
MultiCAN, V2.0
Each Message Pending Register has a Message Index Register MSIDk associated with
it. The Message Index Register MSIDk shows the active (set) pending bit with lowest bit
position within groups of pending bits.
MSIDk (k = 0-7)
Message Index Register k (140
H
+k*4
H
) Reset Value: 0000 0020
H
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
0
r
1514131211109876543210
0INDEX
rrh
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.
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