Rainbow Electronics MAX66140 - Manual (Page 19)

MAX66140
ISO 15693-Compliant Secure Memory
30 ______________________________________________________________________________________
ABRIDGED DATA SHEET
Figure 17. 8-Bit CRC Generator
1ST
STAGE
MSb LSb
2ND
STAGE
3RD
STAGE
4TH
STAGE
7TH
STAGE
8TH
STAGE
6TH
STAGE
5TH
STAGE
X 0 X 1 X 2 X 3 X 4
POLYNOMIAL = X 8 + X 5 + X 4 + 1
INPUT DATA
X 5 X 6 X 7 X 8
Figure 18. CRC-16-CCITT Generator
1ST
STAGE
MSb
LSb
2ND
STAGE
7TH
STAGE
8TH
STAGE
6TH
STAGE
X 0 X 1
3RD
STAGE
4TH
STAGE
5TH
STAGE
X 2 X 3 X 4
POLYNOMIAL = X 16 + X 12 + X 5 + 1
INPUT DATA
X 5 X 6
11TH
STAGE
X 11
9TH
STAGE
10TH
STAGE
X 9 X 10
12TH
STAGE
15TH
STAGE
14TH
STAGE
13TH
STAGE
X 12 X 13 X 14
X 7
16TH
STAGE
X 16 X 15 X 8