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MPC8313VRGDDB 数据表(PDF) 9 Page - Freescale Semiconductor, Inc |
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MPC8313VRGDDB 数据表(HTML) 9 Page - Freescale Semiconductor, Inc |
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9 / 100 page ![]() MPC8313E PowerQUICC™ II Pro Processor Hardware Specifications, Rev. 2.1 Freescale Semiconductor 9 Electrical Characteristics Figure 2 shows the undershoot and overshoot voltages at the interfaces of the MPC8313E. Figure 2. Overshoot/Undershoot Voltage for GVDD/NVDD/LVDD 2.1.3 Output Driver Characteristics Table 3 provides information on the characteristics of the output driver strengths. 2.2 Power Sequencing The MPC8313E does not require the core supply voltage (VDD and VDDC) and IO supply voltages (GVDD, LVDD, and OVDD) to be applied in any particular order. Note that during power ramp-up, before the power supplies are stable and if the I/O voltages are supplied before the core voltage, there might be a period of time that all input and output pins are actively driven and cause contention and excessive current. In order to avoid actively driving the I/O pins and to eliminate excessive current draw, apply the core voltage (VDD Table 3. Output Drive Capability Driver Type Output Impedance ( Ω) Supply Voltage Local bus interface utilities signals 42 NVDD = 3.3 V PCI signals 25 DDR signal 18 GVDD = 2.5 V DDR2 signal 18 GVDD = 1.8 V DUART, system control, I2C, JTAG, SPI 42 NVDD = 3.3 V GPIO signals 42 NVDD = 3.3 V eTSEC signals 42 LVDDA, LVDDB = 2.5/3.3 V USB signals 42 LVDDB = 2.5/3.3 V VSS VSS – 0.3 V VSS – 0.7 V Not to Exceed 10% G/L/NVDD + 20% G/L/NVDD G/L/NVDD + 5% of tinterface 1 1. Note that tinterface refers to the clock period associated with the bus clock VIH VIL Note: interface. |
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