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STM32W108CB データシート(PDF) 68 Page - STMicroelectronics |
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STM32W108CB データシート(HTML) 68 Page - STMicroelectronics |
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68 / 179 page  Serial interfaces STM32W108CB, STM32W108HB 68/179 Doc ID 16252 Rev 2 7.3.4 Serial clock linear prescaler register (SCx_RATELIN) Address offset: 0xC860 (SC1_RATELIN) and 0xC060 (SC2_RATELIN) Reset value: 0x0000 0000 7.3.5 Serial clock exponential prescaler register (SCx_RATEEXP) Address offset: 0xC864 (SC1_RATEEXP) and 0xC064 (SC2_RATEEXP) Reset value: 0x0000 0000 7.4 SPI slave mode Refer to Registers (in the SPI Master Mode section) for a description of the SCx_DATA, SCx_SPICFG, and SCx_SPISTAT registers. [2] SC_SPITXFREE: This bit is set when the transmit FIFO has space to accept at least one byte. [1] SC_SPIRXVAL: This bit is set when the receive FIFO contains at least one byte. [0] SC_SPIRXOVF: This bit is set if a byte is received when the receive FIFO is full. This bit is cleared by reading the data register. 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 SC_RATELIN rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw [3:0] SC_RATELIN: The linear component (LIN) of the clock rate in the equation: Rate = 12 MHz / ( (LIN + 1) * (2^EXP) ) 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 SC_RATEEXP rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw [3:0] SC_RATEEXP: The exponential component (EXP) of the clock rate in the equation: Rate = 12 MHz / ( (LIN + 1) * (2^EXP) ) |
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