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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC8378ECVRALFA датащи(PDF) 9 Page - Freescale Semiconductor, Inc |
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MPC8378ECVRALFA датащи(HTML) 9 Page - Freescale Semiconductor, Inc |
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9 / 126 page  MPC8378E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 2 Freescale Semiconductor 9 Electrical Characteristics Figure 2 shows the undershoot and overshoot voltages at the interfaces of the device. Figure 2. Overshoot/Undershoot Voltage for GVDD/OVDD/LVDD 2.1.3 Output Driver Characteristics Table 4 provides information on the characteristics of the output driver strengths. The values are preliminary estimates. Table 4. Output Drive Capability Driver Type 1 1 Specialized SerDes output capabilities are described in the relevant sections of these specifications (such as SGMII and PCI Express) Output Impedance ( Ω) Supply Voltage Local bus interface utilities signals 45 LBVDD = 2.5 V, 3.3 V 40 LBVDD = 1.8 V PCI signals 25 OVDD = 3.3 V DDR1 signal 18 GVDD = 2.5 V DDR2 signal 18 GVDD = 1.8 V eTSEC 10/100/1000 signals 45 LVDD = 2.5 V, 3.3 V DUART, system control, I2C, JTAG, SPI, and USB 45 OVDD = 3.3 V GPIO signals 45 OVDD = 3.3 V GND GND – 0.3 V GND – 0.7 V Not to Exceed 10% G/L/OVDD + 20% G/L/OVDD G/L/OVDD + 5% of tinterface1 1. Note that tinterface refers to the clock period associated with the bus clock interface. VIH VIL Note: 2. Please note that with the PCI overshoot allowed (as specified above), the device does not fully comply with the maximum AC ratings and device protection guideline outlined in the PCI Rev. 2.3 Specification (Section 4.2.2.3). |
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