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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC8315ECVRAGDA датащи(PDF) 77 Page - Freescale Semiconductor, Inc |
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MPC8315ECVRAGDA датащи(HTML) 77 Page - Freescale Semiconductor, Inc |
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77 / 112 page  MPC8315E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 0 Freescale Semiconductor 77 SPI Figure 56 provides the AC test load for the SPI. Figure 56. SPI AC Test Load Figure 57 and Figure 58 represents the AC timing from Table 67. Note that although the specifications generally reference the rising edge of the clock, these AC timing diagrams also apply when the falling edge is the active edge. Figure 57 shows the SPI timing in slave mode (external clock). Figure 57. SPI AC Timing in Slave Mode (External Clock) Diagram SPI inputs—slave mode (external clock) input setup time tNEIVKH 4— ns SPI inputs—slave mode (external clock) input hold time tNEIXKH 2— ns Notes: 1. Output specifications are measured from the 50% level of the rising edge of SPICLK to the 50% level of the signal. Timings are measured at the pin. 2. The symbols used for timing specifications follow the pattern of t(first two letters of functional block)(signal)(state)(reference)(state) for inputs and t(first two letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tNIKHOX symbolizes the internal timing (NI) for the time SPICLK clock reference (K) goes to the high state (H) until outputs (O) are invalid (X). Table 67. SPI AC Timing Specifications 1 Characteristic Symbol 2 Min Max Unit Output Z0 = 50 Ω NVDD/2 RL = 50 Ω SPICLK (Input) tNEIXKH tNEIVKH tNEKHOV Input Signals: SPIMOSI (See Note) Output Signals: SPIMISO (See Note) Note: The clock edge is selectable on SPI. |
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