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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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ST7MC1K2-Auto 数据表(PDF) 159 Page - STMicroelectronics |
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ST7MC1K2-Auto 数据表(HTML) 159 Page - STMicroelectronics |
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159 / 371 page  Obsolete Product(s) - Obsolete Product(s) ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto On-chip peripherals 159/371 Slave Set the LSLV bit in the SCICR3 register to enter LIN slave mode. In this case, setting the SBK bit has no effect. In LIN slave mode the LIN baud rate generator is selected instead of the conventional prescaler or extended prescaler. The LIN baud rate generator is common to the transmitter and the receiver. The baud rate can then be programmed using LPR and LPRF registers. Note: It is mandatory to set the LIN configuration first before programming LPR and LPRF, because the LIN configuration uses a different baud rate generator from the standard one. LIN transmission In LIN mode the same procedure as in SCI mode has to be applied for a LIN transmission. The procedure to transmit the LIN header is as follows: 1. First set the SBK bit in the SCICR2 register to start transmitting a 13-bit LIN synch break. 2. Reset the SBK bit. 3. Load the LIN synch field (0x55) in the SCIDR register to request synch field transmission. 4. Wait until the SCIDR is empty (TDRE bit set in the SCISR register). 5. Load the LIN message identifier in the SCIDR register to request identifier transmission. Figure 64. LIN characters Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Start bit Stop bit Next start bit Idle line 8-bit word length (M bit is reset) LIN synch break = 13 low bits Extra ‘1’ Data character Next data character LIN synch field LIN synch field Measurement for baud rate autosynchronization Start bit Start bit Next start bit Stop bit Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Start bit Obsolete Product(s) - Obsolete Product(s) |
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