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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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STPM33 데이터시트(PDF) 52 Page - STMicroelectronics |
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STPM33 데이터시트(HTML) 52 Page - STMicroelectronics |
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52 / 89 page  Table 31. Baud rate register examples Baud rate BRDIV BRRI BRRF Register value 2400 416.666667 416 = 0x1A0 11 = 0xB 1A0B 9600 104.166667 104 = 0x68 3 = 0x3 683 19200 52.0833333 52 = 0x34 1 = 0x1 341 57600 17.3611111 17 = 0x11 6 = 0x6 116 115200 8.68055556 8 = 0x8 11 = 0xB 8B 230400 4.34027778 4 = 0x4 5 = 0x5 45 460800 2.17013889 2 = 0x2 3 = 0x3 23 8.6.4 UART/SPI status register and interrupt control register At row 20, at read address 0x28, the register is responsible for holding the status of UART/SPI peripherals of the STPM3x device. Setting the correspondent bit in IRQ CR the interrupt mask raises an interrupt on both INT1, INT2 pins based on the peripheral status. Table 32. UART/SPI status and interrupt control register Register Bit position Description Default value Access mode SR 30 SPI RX overrun 0 RW 29 SPITX underrun 0 RW 28 SPI CRC error 0 RW 27 UART/SPI write address error 0 RW 26 UART/SPI read address error 0 RW 25 SPITX empty 0 RO 24 SPI RX full 0 RO 22 UART TX overrun 0 RW 21 UART RX overrun 0 RW 20 UART noise error 0 RW 19 UART frame error 0 RW 18 UART timeout error 0 RW 17 UART CRC error 0 RW 16 UART break 0 RW IRQ CR 14 mask for SPI RX overrun error status bit 0 RW 13 maskfor SPI TX underrun error status bit 0 RW 12 mask for SPI CRC error status bit 0 RW 11 mask for write address error status bit 0 RW 10 mask for read address error status bit 0 RW 9 mask for SPITX empty 0 RW 8 mask for SPI RX full 0 RW 6 mask for UART TX overrun 0 RW 5 mask for UART RX overrun 0 RW 4 mask for UART noise error 0 RW 3 mask for UART frame error 0 RW STPM32, STPM33, STPM34 Communication protocol DS10272 - Rev 13 page 52/89 |
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