54F402 NSC [National Semiconductor], 54F402 Datasheet - Page 3

• Manufacturer Part Number: 54F402
• Description: Serial Data Polynomial Generator/Checker
• Manufacturer: NSC [National Semiconductor]

Block Diagram
Hex
C
D
E
B
A
0
F
7
3
2
4
8
5
9
1
6
S
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
3
Select Code
S
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
2
S
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
1
S
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
0
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
32
12
32
15
16
16
56
39
22
5
48
23
15
32
11
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
a
26
11
31
13
15
12
55
38
19
36
21
13
23
2
1
a
TABLE I
a
a
a
a
a
a
a
a
a
a
a
a
a
1
X
X
X
X
X
X
X
X
X
X
X
X
3
23
10
27
12
2
5
49
37
17
35
8
21
a
a
a
a
a
a
a
a
a
a
a
a
1
1
X
X
X
X
X
X
X
X
2
22
8
26
11
45
36
16
a
a
a
a
a
a
a
a
1
X
Polynomial
X
X
X
X
X
X
7
16
25
9
41
31
15
a
a
a
X
a
a
a
a
X
5
X
X
a
7
19
14
a
X
a
X
a
4
a
6
X
X
a
16
12
X
X
2
a
a
5
a
a
X
X
11
X
a
4
a
a
1
X
X
9
2
a
a
X
a
TL F 9535– 5
1
S
Ethernet
Polynomial
Ethernet
Residue
CRC-16
CRC-CCITT
56th
Order
48th
Order
32nd
Order
Remarks
e
0