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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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RM0312 데이터시트(PDF) 223 Page - STMicroelectronics |
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RM0312 데이터시트(HTML) 223 Page - STMicroelectronics |
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223 / 275 page  DocID022352 Rev 3 223/275 RM0312 Serial peripheral interface (SPI) 223 20.4.5 SPI data register (SPI_DR) Address offset: 0x04 Reset value: 0x00 20.5 SPI register map and reset values 7 654 3210 DR[7:0] rw Bits 7:0 DR[7:0]: Data register Byte received or to be transmitted. The data register is split into 2 buffers - one for writing (Transmit buffer) and another one for reading (Receive buffer). A write to the data register will write into the Tx buffer and a read from the data register will return the value held in the Rx buffer. Table 44. 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 - 000 RXONLY 0 SSM 0 SSI 0 0x02 SPI_ICR Reset value TXIE 0 RXIE 0 ERRIE 0 WKIE 0 - 0000 0x03 SPI_SR Reset value BSY 0 OVR 0 MODF 0 - 0 WKUP 0 - 0 TXE 1 RXNE 0 0x04 SPI_DR Reset value DR[7:0] 0 |
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