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MPC8280VRM 数据表(PDF) 17 Page - Freescale Semiconductor, Inc |
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MPC8280VRM 数据表(HTML) 17 Page - Freescale Semiconductor, Inc |
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17 / 80 page ![]() MPC8280 PowerQUICC II™ Family Hardware Specifications, Rev. 1.7 Freescale Semiconductor 17 AC Electrical Characteristics Figure 5 shows the SCC/SMC/SPI/I2C external clock. Figure 5. SCC/SMC/SPI/I2C External Clock Diagram Figure 6 shows the SCC/SMC/SPI/I2C internal clock. Figure 6. SCC/SMC/SPI/I2C Internal Clock Diagram Serial CLKin SCC/SMC/SPI/I2C input signals SCC/SMC/SPI/I2C output signals sp18b sp19b sp38b/sp39b (See note) (See note) Note: There are four possible timing conditions for SCC and SPI: 1. Input sampled on the rising edge and output driven on the rising edge (shown). 2. Input sampled on the rising edge and output driven on the falling edge. 3. Input sampled on the falling edge and output driven on the falling edge. 4. Input sampled on the falling edge and output driven on the rising edge. BRG_OUT SCC/SMC/SPI/I2C input signals SCC/SMC/SPI/I2C output signals sp18a sp19a sp38a/sp39a (See note) (See note) Note: There are four possible timing conditions for SCC and SPI: 1. Input sampled on the rising edge and output driven on the rising edge (shown). 2. Input sampled on the rising edge and output driven on the falling edge. 3. Input sampled on the falling edge and output driven on the falling edge. 4. Input sampled on the falling edge and output driven on the rising edge. |
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