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MPC5200 датащи(PDF) 46 Page - Freescale Semiconductor, Inc |
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MPC5200 датащи(HTML) 46 Page - Freescale Semiconductor, Inc |
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46 / 80 page ![]() MPC5200 Data Sheet, Rev. 4 Electrical and Thermal Characteristics Freescale Semiconductor 46 Figure 31. Ethernet Timing Diagram—MII Serial Management 3.3.10 USB Table 34. MII Serial Management Channel Signal Timing Sym Description Min Max Unit SpecID M9 MDC falling edge to MDIO output delay 0 25 ns A9.9 M10 MDIO (input) to MDC rising edge setup 10 — ns A9.10 M11 MDIO (input) to MDC rising edge hold 10 — ns A9.11 M12 MDC pulse width high1 NOTES: 1 MDC is generated by MPC5200 with a duty cycle of 50% except when MII_SPEED in the FEC MII_SPEED control register is changed during operation. See the MPC5200 User Manual [1]. 160 — ns A9.12 M13 MDC pulse width low(1) 160 — ns A9.13 M14 MDC period2 2 The MDC period must be set to a value of less then or equal to 2.5 MHz (to be compliant with the IEEE MII characteristic) by programming the FEC MII_SPEED control register. See the MPC5200 User Manual [1]. 400 — ns A9.14 Table 35. Timing Specifications—USB Output Line Sym Description Min Max Units SpecID 1 USB Bit width1 NOTES: 1 Defined in the USB config register, (12 Mbit/s or 1.5 Mbit/s mode). 83.3 667 ns A10.1 2 Transceiver enable time 83.3 667 ns A10.2 3 Signal falling time — 7.9 ns A10.3 4 Signal rising time — 7.9 ns A10.4 M13 M12 M11 MDC (Output) MDIO (Input) MDIO (Output) M10 M9 M14 |
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