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STM8S Datasheet(PDF) 287 Page - STMicroelectronics

Part # STM8S
Description  STM8S Series and STM8AF Series 8-bit microcontrollers
PDF  467 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM8S Datasheet(HTML) 287 Page - STMicroelectronics

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DocID14587 Rev 14
287/467
RM0016
Serial peripheral interface (SPI)
287
20.4.8
SPI Tx CRC register (SPI_TXCRCR)
Address offset: 0x07Reset value: 0x00
20.5
SPI register map and reset values
7
654
3210
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
54
32
10
0x00
SPI_CR1
Reset value
LSB FIRST
0
SPE
0
BR2
0
BR1
0
BR0
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
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
DR[7:0]
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



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