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PC912XDP512F0MPVR 데이터시트(PDF) 480 Page - Freescale Semiconductor, Inc |
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PC912XDP512F0MPVR 데이터시트(HTML) 480 Page - Freescale Semiconductor, Inc |
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480 / 1348 page ![]() Chapter 11 Serial Communication Interface (S12SCIV5) MC9S12XDP512 Data Sheet, Rev. 2.21 480 Freescale Semiconductor 11.2 External Signal Description The SCI module has a total of two external pins. 11.2.1 TXD — Transmit Pin The TXD pin transmits SCI (standard or infrared) data. It will idle high in either mode and is high impedance anytime the transmitter is disabled. 11.2.2 RXD — Receive Pin The RXD pin receives SCI (standard or infrared) data. An idle line is detected as a line high. This input is ignored when the receiver is disabled and should be terminated to a known voltage. 11.3 Memory Map and Register Definition This section provides a detailed description of all the SCI registers. 11.3.1 Module Memory Map and Register Definition The memory map for the SCI module is given below in Figure 11-2. The address listed for each register is the address offset. The total address for each register is the sum of the base address for the SCI module and the address offset for each register. |
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