ST STM32L0x3 User Manual

RM0367 Rev 7 919/1043
RM0367 Serial peripheral interface/ inter-IC sound (SPI/I2S)
922
31.7.6 SPI RX CRC register (SPI_RXCRCR) (not used in I
2
S mode)
Address offset: 0x14
Reset value: 0x0000
31.7.7 SPI TX CRC register (SPI_TXCRCR) (not used in I
2
S mode)
Address offset: 0x18
Reset value: 0x0000
1514131211109876543210
RXCRC[15:0]
rrrrrrrrrrrrrrrr
Bits 15:0 RXCRC[15:0]: Rx CRC register
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 any CRC8 standard.
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 any CRC16
standard.
Note: A read to this register when the BSY Flag is set could return an incorrect value.These
bits are not used for I
2
S mode.
1514131211109876543210
TXCRC[15:0]
rrrrrrrrrrrrrrrr
Bits 15:0 TXCRC[15:0]: Tx CRC register
When CRC calculation is enabled, the TxCRC[7:0] bits contain the computed CRC value of
the subsequently transmitted bytes. This register is reset when the CRCEN bit of SPI_CR1
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 any CRC8 standard.
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 any CRC16
standard.
Note: A read to this register when the BSY flag is set could return an incorrect value. These
bits are not used for I
2
S mode.

ST STM32L0x3 Specifications

General

Brand	ST
Model	STM32L0x3
Category	Microcontrollers
Language	English