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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DM385 датащи(PDF) 177 Page - Texas Instruments |
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DM385 датащи(HTML) 177 Page - Texas Instruments |
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177 / 281 page  EMAC[x]_RGRXD[3:0] (B) EMAC[x]_RGRXCTL (B) EMAC[x]_RGRXC (at device) (A) 5 RXERR RXDV 1st Half-byte 2nd Half-byte RGRXD[7:4] RGRXD[3:0] 2 3 1 4 4 6 DM385, DM388 www.ti.com SPRS821D – MARCH 2013 – REVISED DECEMBER 2013 Table 8-20. Timing Requirements for EMAC RGMII Input Receive for 10/100/1000 Mbps(1) (see Figure 8-16) OPP100/OPP120/ Turbo/Nitro NO. UNIT MIN MAX tsu(RGRXD- Setup time, receive selected signals valid before Internal delay 5 1.0 ns RGRXCH) EMAC[x]_RGRXC (at device) high/low enabled th(RGRXCH- Hold time, receive selected signals valid after Internal delay 6 1.0 ns RGRXD) EMAC[x]_RGRXC (at device) high/low enabled (1) For RGMII, receive selected signals include: EMAC[x]_RGRXD[3:0] and EMAC[x]_RGRXCTL. A. EMAC[x]_RGRXC must be externally delayed relative to the data and control pins. The internal delay can be enabled or disabled via the EMAC RGMIIn_ID_MODE register. B. Data and control information is received using both edges of the clocks. EMAC[x]_RGRXD[3:0] carries data bits 3-0 on the rising edge of EMAC[x]_RGRXC and data bits 7-4 on the falling edge of EMAC[x]_RGRXC. Similarly, EMAC[x]_RGRXCTL carries RXDV on rising edge of EMAC[x]_RGRXC and RXERR on falling edge of EMAC[x]_RGRXC. Figure 8-16. EMAC Receive Interface Timing [RGMII Operation] Table 8-21. Switching Characteristics Over Recommended Operating Conditions for RGTXC - RGMII Operation for 10/100/1000 Mbit/s (see Figure 8-17) OPP100/OPP120/ Turbo/Nitro NO. UNIT MIN MAX 10 Mbps 360 440 1 tc(RGTXC) Cycle time, EMAC[x]_RGTXC 100 Mbps 36 44 ns 1000 Mbps 7.2 8.8 10 Mbps 0.40*tc(RGTXC) 0.60*tc(RGTXC) 2 tw(RGTXCH) Pulse duration, EMAC[x]_RGTXC high 100 Mbps 0.40*tc(RGTXC) 0.60*tc(RGTXC) ns 1000 Mbps 0.45*tc(RGTXC) 0.55*tc(RGTXC) 10 Mbps 0.40*tc(RGTXC) 0.60*tc(RGTXC) 3 tw(RGTXCL) Pulse duration, EMAC[x]_RGTXC low 100 Mbps 0.40*tc(RGTXC) 0.60*tc(RGTXC) ns 1000 Mbps 0.45*tc(RGTXC) 0.55*tc(RGTXC) 10 Mbps 0.75 4 tt(RGTXC) Transition time, EMAC[x]_RGTXC 100 Mbps 0.75 ns 1000 Mbps 0.75 Copyright © 2013, Texas Instruments Incorporated Peripheral Information and Timings 177 Submit Documentation Feedback Product Folder Links: DM385 DM388 |
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