Motorola MCF5282 ユーザーズマニュアル
17-14
MCF5282 User’s Manual
MOTOROLA
Functional Description
The effectiveness of the hash table declines as the number of addresses increases.
The hash table registers must be initialized by the user. The CRC32 polynomial to use in
computing the hash is:
computing the hash is:
A table of example Destination Addresses and corresponding hash values is included below
for reference.
for reference.
Table 17-7. Destination Address to 6-Bit Hash
48-bit DA
6-bit Hash (in
hex)
Hash Decimal
Value
65:ff:ff:ff:ff:ff
0x0
0
55:ff:ff:ff:ff:ff
0x1
1
15:ff:ff:ff:ff:ff
0x2
2
35:ff:ff:ff:ff:ff
0x3
3
b5:ff:ff:ff:ff:ff
0x4
4
95:ff:ff:ff:ff:ff
0x5
5
d5:ff:ff:ff:ff:ff
0x6
6
f5:ff:ff:ff:ff:ff
0x7
7
db:ff:ff:ff:ff:ff
0x8
8
fb:ff:ff:ff:ff:ff
0x9
9
bb:ff:ff:ff:ff:ff
0xa
10
8b:ff:ff:ff:ff:ff
0xb
11
0b:ff:ff:ff:ff:ff
0xc
12
3b:ff:ff:ff:ff:ff
0xd
13
7b:ff:ff:ff:ff:ff
0xe
14
5b:ff:ff:ff:ff:ff
0xf
15
27:ff:ff:ff:ff:ff
0x10
16
07:ff:ff:ff:ff:ff
0x11
17
57:ff:ff:ff:ff:ff
0x12
18
77:ff:ff:ff:ff:ff
0x13
19
f7:ff:ff:ff:ff:ff
0x14
20
c7:ff:ff:ff:ff:ff
0x15
21
97:ff:ff:ff:ff:ff
0x16
22
a7:ff:ff:ff:ff:ff
0x17
23
X
32
X
26
X
23
X
22
X
16
X
12
X
11
X
10
X
8
X
7
X
5
X
4
X
2
X 1
+
+
+
+
+
+
+
+
+
+
+
+
+
+