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MPC8360 数据表(PDF) 29 Page - Freescale Semiconductor, Inc |
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MPC8360 数据表(HTML) 29 Page - Freescale Semiconductor, Inc |
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29 / 112 page ![]() MPC8360E/MPC8358E PowerQUICC™ II Pro Processor Revision 2.x TBGA Silicon Hardware Specifications, Rev. 2 Freescale Semiconductor 29 UCC Ethernet Controller: Three-Speed Ethernet, MII Management Figure 9 shows the GMII transmit AC timing diagram. Figure 9. GMII Transmit AC Timing Diagram 8.2.1.2 GMII Receive AC Timing Specifications Table 28 provides the GMII receive AC timing specifications. Table 28. GMII Receive AC Timing Specifications At recommended operating conditions with LVDD / OVDD of 3.3 V ± 10%. Parameter/Condition Symbol 1 Min Typ Max Unit Notes RX_CLK clock period tGRX —8.0 — ns RX_CLK duty cycle tGRXH/tGRX 40 — 60 % RXD[7:0], RX_DV, RX_ER setup time to RX_CLK tGRDVKH 2.0 — — ns RXD[7:0], RX_DV, RX_ER hold time to RX_CLK tGRDXKH 0.2 — — ns 2 RX_CLK clock rise time, VIL(min) to VIH(max) tGRXR —— 1.0 ns RX_CLK clock fall time, VIH(max) to VIL(min) tGRXF —— 1.0 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, tGRDVKH symbolizes GMII receive timing (GR) with respect to the time data input signals (D) reaching the valid state (V) relative to the tRX clock reference (K) going to the high state (H) or setup time. Also, tGRDXKL symbolizes GMII receive timing (GR) with respect to the time data input signals (D) went invalid (X) relative to the tGRX 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 tGRX represents the GMII (G) receive (RX) clock. For rise and fall times, the latter convention is used with the appropriate letter: R (rise) or F (fall). 2. In rev 2.0 silicon, due to errata, tGRDXKH minimum is 0.5 which is not compliant with the standard. Please refer to QE_ENET18 in the device errata document. GTX_CLK TXD[7:0] tGTKHDX tGTX tGTXH tGTXR tGTXF TX_EN TX_ER |
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