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MPC8560CPXAPDB 数据表(PDF) 30 Page - Freescale Semiconductor, Inc |
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MPC8560CPXAPDB 数据表(HTML) 30 Page - Freescale Semiconductor, Inc |
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30 / 108 page  MPC8560 Integrated Processor Hardware Specifications, Rev. 3.1 30 Freescale Semiconductor Ethernet: Three-Speed, MII Management Figure 11 shows the MII receive AC timing diagram. Figure 11. MII Receive AC Timing Diagram 7.2.3 TBI AC Timing Specifications This section describes the TBI transmit and receive AC timing specifications. RX_CLK clock period 10 Mbps tMRX 2 — 400 — ns RX_CLK clock period 100 Mbps tMRX — 40 — ns RX_CLK duty cycle tMRXH/tMRX 35 — 65 % RXD[3:0], RX_DV, RX_ER setup time to RX_CLK tMRDVKH 10.0 — — ns RXD[3:0], RX_DV, RX_ER hold time to RX_CLK tMRDXKH 10.0 — — ns RX_CLK clock rise (20%-80%) tMRXR 2 1.0 — 4.0 ns RX_CLK clock fall time (80%-20%) tMRXF 2 1.0 — 4.0 ns Note: 1. The symbols used for timing specifications herein follow the pattern of t(first two letters of functional block)(signal)(state) (reference)(state) for inputs and t(first two letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tMRDVKH symbolizes MII receive timing (MR) with respect to the time data input signals (D) reach the valid state (V) relative to the tMRX clock reference (K) going to the high (H) state or setup time. Also, tMRDXKL symbolizes MII receive timing (GR) with respect to the time data input signals (D) went invalid (X) relative to the tMRX clock reference (K) going to the low (L) state or hold time. Note that, in general, the clock reference symbol representation is based on three letters representing the clock of a particular functional. For example, the subscript of tMRX represents the MII (M) receive (RX) clock. For rise and fall times, the latter convention is used with the appropriate letter: R (rise) or F (fall). 2.Guaranteed by design. Table 23. MII Receive AC Timing Specifications (continued) At recommended operating conditions with LVDD of 3.3 V ± 5%. Parameter/Condition Symbol 1 Min Typ Max Unit RX_CLK RXD[3:0] tMRDXKH tMRX tMRXH tMRXR tMRXF RX_DV RX_ER tMRDVKH Valid Data |
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