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MPC8378E Scheda tecnica(PDF) 37 Page - Freescale Semiconductor, Inc |
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MPC8378E Scheda tecnica(HTML) 37 Page - Freescale Semiconductor, Inc |
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37 / 128 page ![]() MPC8378E PowerQUICC II Pro Processor Hardware Specifications, Rev. 8 Freescale Semiconductor 37 8.4.1 MII Management DC Electrical Characteristics The MDC and MDIO are defined to operate at a supply voltage of 2.5 V or 3.3 V. The DC electrical characteristics for MDIO and MDC are provided in Table 36 and Table 37. 8.4.2 MII Management AC Electrical Specifications This table provides the MII management AC timing specifications. Table 36. MII Management DC Electrical Characteristics When Powered at 2.5 V Parameter Conditions Symbol Min Max Unit Supply voltage (2.5 V) — LVDD1 2.37 2.63 V Output high voltage IOH = –1.0 mA LVDD1 = Min VOH 2.00 LVDD1 + 0.3 V Output low voltage IOL = 1.0 mA LVDD1 = Min VOL GND – 0.3 0.40 V Input high voltage — LVDD1 = Min VIH 1.7 — V Input low voltage — LVDD1 = Min VIL –0.3 0.70 V Input high current VIN = LVDD1 IIH —20 μA Input low current VIN = LVDD1 IIL –15 — μA Table 37. MII Management DC Electrical Characteristics When Powered at 3.3 V Parameter Conditions Symbol Min Max Unit Supply voltage (3.3 V) — LVDD1 3.135 3.465 V Output high voltage IOH = –1.0 mA LVDD1 = Min VOH 2.10 LVDD1 +0.3 V Output low voltage IOL = 1.0 mA LVDD1 = Min VOL GND 0.50 V Input high voltage — VIH 2.00 — V Input low voltage — VIL —0.80 V Input high current LVDD1 = Max VIN 1 = 2.1 V IIH —30 μA Input low current LVDD1 = Max VIN = 0.5 V IIL –600 — μA Table 38. MII Management AC Timing Specifications Parameter Symbol1 Min Typical Max Unit Note MDC frequency fMDC —2.5 — MHz 2 MDC period tMDC 80 — 400 ns — MDC clock pulse width high tMDCH 32 — — ns — MDC to MDIO valid tMDKHDV 2 × (tplb_clk × 8) — — ns 4 MDC to MDIO delay tMDKHDX 10 — 2 × (tplb_clk × 8) ns 2, 4 MDIO to MDC setup time tMDDVKH 5— — ns — MDIO to MDC hold time tMDDXKH 0— — ns — |
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