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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SC312XDP512F0MPVR датащи(PDF) 497 Page - Freescale Semiconductor, Inc |
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SC312XDP512F0MPVR датащи(HTML) 497 Page - Freescale Semiconductor, Inc |
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497 / 1348 page  Chapter 11 Serial Communication Interface (S12SCIV5) MC9S12XDP512 Data Sheet, Rev. 2.21 Freescale Semiconductor 497 11.4.5 Transmitter Figure 11-16. Transmitter Block Diagram 11.4.5.1 Transmitter Character Length The SCI transmitter can accommodate either 8-bit or 9-bit data characters. The state of the M bit in SCI control register 1 (SCICR1) determines the length of data characters. When transmitting 9-bit data, bit T8 in SCI data register high (SCIDRH) is the ninth bit (bit 8). 11.4.5.2 Character Transmission To transmit data, the MCU writes the data bits to the SCI data registers (SCIDRH/SCIDRL), which in turn are transferred to the transmitter shift register. The transmit shift register then shifts a frame out through the TXD pin, after it has prefaced them with a start bit and appended them with a stop bit. The SCI data registers (SCIDRH and SCIDRL) are the write-only buffers between the internal data bus and the transmit shift register. PE PT H 8 76543210L 11-Bit Transmit Register T8 TIE TDRE TCIE SBK TC Parity Generation SCI Data Registers Transmitter Control M Internal Bus SBR12:SBR0 Baud Divider ÷ 16 Bus Clock TE SCTXD TXPOL LOOPS LOOP RSRC CONTROL To Receiver Transmit Collision Detect TDRE IRQ TC IRQ SCTXD SCRXD (From Receiver) TCIE BERRIF BER IRQ BERRM[1:0] |
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