MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 619

• Manufacturer Part Number: MCBSTM32EXL
• Description: BOARD EVALUATION FOR STM32F103ZE
• Manufacturer: Keil

Specifications of MCBSTM32EXL

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RM0008
23.5.5
23.5.6
15
15
rw
r
Bits 15:0 CRCPOLY[15:0]: CRC polynomial register
Bits 15:0 RXCRC[15:0]: Rx CRC register
14
rw
14
r
Note: Not used for the I
SPI CRC polynomial register (SPI_CRCPR) (not used in I
mode)
Address offset: 0x10
Reset value: 0x0007
SPI Rx CRC register (SPI_RXCRCR) (not used in I
Address offset: 0x14
Reset value: 0x0000
Note: A read to this register when the BSY Flag is set could return an incorrect value.
This register contains the polynomial for the CRC calculation.
The CRC polynomial (0007h) is the reset value of this register. Another polynomial can be
configured as required.
13
rw
13
When CRC calculation is enabled, the RxCRC[15:0] bits contain the computed CRC value of the
subsequently received bytes. This register is reset when the CRCEN bit in SPI_CR1 register is
written to 1. The CRC is calculated serially using the polynomial programmed in the SPI_CRCPR
register.
Only the 8 LSB bits are considered when the data frame format is set to be 8-bit data (DFF bit of
SPI_CR1 is cleared). CRC calculation is done based on CRC8.
The entire 16-bits of this register are considered when a 16-bit data frame format is selected (DFF
bit of the SPI_CR1 register is set). CRC calculation is done based on CRC16 - CCITT standard.
r
Not used for the I
12
rw
12
r
11
11
rw
r
2
10
rw
10
S mode.
2
r
S mode.
rw
9
9
r
Doc ID 13902 Rev 9
CRCPOLY[15:0]
RxCRC[15:0]
rw
8
8
r
rw
7
7
r
rw
6
6
r
rw
5
5
r
Serial peripheral interface (SPI)
rw
4
4
r
2
S mode)
rw
3
3
r
2
S
rw
2
2
r
rw
1
1
r
619/995
rw
0
0
r