Datasheet

21.5.8 CRC Polynomial 3 Register (CRC_P3)
P3 is one of the CRC polynomial registers (P0:P3). The set of CRC polynominal registers
contains the value of polynomial. The registers of P0:P1 contain the MSB 16-bit of CRC
polynomial, which is used only in CRC 32-bit mode. The registers of P2:P3 contain the
LSB 16-bit of CRC polynomial, which is used in both CRC 16- and 32-bit modes.
Address: 3060h base + 7h offset = 3067h
Bit 7 6 5 4 3 2 1 0
Read
P3
Write
Reset
0 0 1 0 0 0 0 1
CRC_P3 field descriptions
Field Description
7–0
P3
CRC Polynominal Bit 7:0
21.5.9 CRC Control Register (CRC_CTRL)
Address: 3060h base + 8h offset = 3068h
Bit 7 6 5 4 3 2 1 0
Read
TOT TOTR
0
FXOR WAS TCRC
Write
Reset
0 0 0 0 0 0 0 0
CRC_CTRL field descriptions
Field Description
7–6
TOT
Reverse of Write
These bits identify the reverse of the input data.
00 No reverse.
01 Bit is reversed in byte; No byte is reversed.
10 Reserved.
11 Reserved.
5–4
TOTR
Reverse of Read
These bits identify the reverse of the output data.
00 No reverse.
01 Bit is reversed in byte; No byte is reversed.
10 Reserved.
11 Reserved.
Table continues on the next page...
Chapter 21 Cyclic redundancy check (CRC)
MC9S08PA60 Reference Manual, Rev. 1, 9/2012
Freescale Semiconductor, Inc. 571