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MPC8555CPXAPF датащи(PDF) 46 Page - Freescale Semiconductor, Inc |
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MPC8555CPXAPF датащи(HTML) 46 Page - Freescale Semiconductor, Inc |
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46 / 88 page ![]() MPC8555E PowerQUICC™ III Integrated Communications Processor Hardware Specifications, Rev. 4 46 Freescale Semiconductor CPM Figure 26 shows the SCC/SMC/SPI 1,2external clock. Figure 26. SCC/SMC/SPI AC Timing External Clock Diagram Figure 27 shows the SCC/SMC/SPI 1,2 internal clock. Figure 27. SCC/SMC/SPI AC Timing Internal Clock Diagram Figure 28 shows TDM input and output signals. Figure 28. TDM Signal AC Timing Diagram 1 SPI AC timings are internal mode when it is master since SPICLK is an output, and external mode when it is slave. 2 SPI AC timings refer always to SPICLK. Serial CLKIN tNEIXKH tNEIVKH tNEKHOX Input Signals: (See Note) Output Signals: (See Note) Note: SCC/SMC/SPI SCC/SMC/SPI The clock edge is selectable on SCC and SPI. BRG_OUT tNIIXKH tNIKHOX Input Signals: (See Note) Output Signals: (See Note) Note: tNIIVKH SCC/SMC/SPI SCC/SMC/SPI The clock edge is selectable on SCC and SPI. Serial CLKIN tTDKHOX TDM Input Signals There are 4 possible TDM timing conditions: tTDIVKH tTDIXKH TDM Output Signals Note: 1. 2. 3. 4. Input sampled on the rising edge and output driven on the rising edge (shown). Input sampled on the rising edge and output driven on the falling edge. Input sampled on the falling edge and output driven on the falling edge. Input sampled on the falling edge and output driven on the rising edge. |
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