Crc Polynomial (Crc_Pol); Crc Register Map; Table 15. Crc Register Map And Reset Values - STMicroelectronics RM0365 Reference Manual

RM0365
Bits 31:0 CRC_INIT: Programmable initial CRC value
This register is used to write the CRC initial value.
6.4.5

CRC polynomial (CRC_POL)

Address offset: 0x14
Reset value: 0x04C11DB7
31 30 29 28
15 14 13 12
Bits 31:0 POL[31:0]: Programmable polynomial
This register is used to write the coefficients of the polynomial to be used for CRC calculation.
If the polynomial size is less than 32-bits, the least significant bits have to be used to program the
correct value.
6.4.6

CRC register map

Offset Register
CRC_DR
0x00
Reset value
1
CRC_IDR
0x04
Reset value
CRC_CR
0x08
Reset value
CRC_INIT
0x10
Reset value 1
CRC_POL
0x14
Reset value
Refer to
27 26 25
11 10 9

Table 15. CRC register map and reset values

1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
Section 3.2.2 on page 47
Cyclic redundancy check calculation unit (CRC)
24 23 22
POL[31:16]
rw
8 7 6
POL[15:0]
rw
DR[31:0]
1 1 1 1 1 1 1 1
CRC_INIT[31:0]
1 1 1 1 1 1 1 1
Polynomial coefficients
0x04C11DB7
for the register boundary addresses.
DocID025202 Rev 7
21 20 19
5 4 3
1 1 1 1 1 1 1 1 1
0 0
0 0
1 1 1 1 1 1 1 1 1
18 17 16
2 1 0
1 1 1 1 1 1
IDR[7:0]
0 0 0 0 0 0
0 0 0 0
1 1 1 1 1 1
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