ST STM8S Reference Manual

RM0016 Serial peripheral interface (SPI)
Doc ID 14587 Rev 8 277/449
20.4.8 SPI Tx CRC register (SPI_TXCRCR)
Address offset: 0x07Reset value: 0x00
20.5 SPI register map and reset values
76543210
TxCRC[7:0]
r
Bits 7:0 TxCRC[7:0]: 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_CR2 is written to 1.
The CRC is calculated serially using the polynomial programmed in the SPI_CRCPR register.
Note: A read to this register when the BSY flag is set could return a incorrect value
Table 47. SPI register map and reset values
Address
offset
Register
name
76 5 4 3 2 1 0
0x00
SPI_CR1
reset value
LSB
FIRST
0
SPE
0
BR2
0
BR1
0
BR1
0
MSTR
0
CPOL
0
CPHA
0
0x01
SPI_CR2
reset value
BDM
0
BDOE
0
CRCEN
0
CRCNEXT
0
-
0
RXONLY
0
SSM
0
SSI
0
0x02
SPI_ICR
reset value
TXIE
0
RXIE
0
ERRIE
0
WKIE
0
-
0
-
00 0
0x03
SPI_SR
reset value
BSY
0
OVR
0
MODF
0
CRCERR
0
WKUP
0
-
0
TXE
1
RXNE
0
0x04
SPI_DR
reset value
MSB
0
-
0
-
0
-
0
-
0
-
0
-
0
LSB
0
0x05
SPI_CRCPR
reset value
MSB
0
-
0
-
0
-
0
-
0
-
1
-
1
LSB
1
0x06
SPI_RXCRCR
reset value
MSB
0
-
0
-
0
-
0
-
0
-
0
-
0
LSB
0
0x07
SPI_TXCRCR
reset value
MSB
0
-
0
-
0
-
0
-
0
-
0
-
0
LSB
0

ST STM8S Specifications

General

Brand	ST
Model	STM8S
Category	Microcontrollers
Language	English