ST STM32G474 User Manual

RM0440 Rev 4 465/2126
RM0440 Cyclic redundancy check calculation unit (CRC)
466
16.4.3 CRC control register (CRC_CR)
Address offset: 0x08
Reset value: 0x0000 0000
16.4.4 CRC initial value (CRC_INIT)
Address offset: 0x10
Reset value: 0xFFFF FFFF
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
1514131211109876543210
Res. Res. Res. Res. Res. Res. Res. Res.
REV_
OUT
REV_IN[1:0] POLYSIZE[1:0] Res. Res. RESET
rw rw rw rw rw rs
Bits 31:8 Reserved, must be kept at reset value.
Bit 7 REV_OUT: Reverse output data
This bit controls the reversal of the bit order of the output data.
0: Bit order not affected
1: Bit-reversed output format
Bits 6:5 REV_IN[1:0]: Reverse input data
These bits control the reversal of the bit order of the input data
00: Bit order not affected
01: Bit reversal done by byte
10: Bit reversal done by half-word
11: Bit reversal done by word
Bits 4:3 POLYSIZE[1:0]: Polynomial size
These bits control the size of the polynomial.
00: 32 bit polynomial
01: 16 bit polynomial
10: 8 bit polynomial
11: 7 bit polynomial
Bits 2:1 Reserved, must be kept at reset value.
Bit 0 RESET: RESET bit
This bit is set by software to reset the CRC calculation unit and set the data register to the value
stored in the CRC_INIT register. This bit can only be set, it is automatically cleared by hardware
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
CRC_INIT[31:16]
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
CRC_INIT[15:0]
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw

ST STM32G474 Specifications

General

Brand	ST
Model	STM32G474
Category	Microcontrollers
Language	English