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AM3351 Datasheet(PDF) 118 Page - Texas Instruments |
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AM3351 Datasheet(HTML) 118 Page - Texas Instruments |
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118 / 252 page  MDIO_CLK (Output) 1 2 MDIO_DATA (Input) 118 AM3359, AM3358, AM3357, AM3356, AM3354, AM3352, AM3351 SPRS717J – OCTOBER 2011 – REVISED APRIL 2016 www.ti.com Submit Documentation Feedback Product Folder Links: AM3359 AM3358 AM3357 AM3356 AM3354 AM3352 AM3351 Peripheral Information and Timings Copyright © 2011–2016, Texas Instruments Incorporated 7.6 Ethernet Media Access Controller (EMAC) and Switch 7.6.1 EMAC and Switch Electrical Data and Timing The EMAC and Switch implemented in the AM335x device supports GMII mode, but the AM335x design does not pin out 9 of the 24 GMII signals. This was done to reduce the total number of package terminals. Therefore, the AM335x device does not support GMII mode. MII mode is supported with the remaining GMII signals. The AM335x and AMIC110 Sitara Processors Technical Reference Manual and this document may reference internal signal names when discussing peripheral input and output signals because many of the AM335x package terminals can be multiplexed to one of several peripheral signals. For example, the AM335x terminal names for port 1 of the EMAC and switch have been changed from GMII to MII to indicate their Mode 0 function, but the internal signal is named GMII. However, documents that describe the Ethernet switch reference these signals by their internal signal name. For a cross-reference of internal signal names to terminal names, see Table 4-2. Operation of the EMAC and switch is not supported for OPP50. Table 7-5. EMAC and Switch Timing Conditions PARAMETER MIN TYP MAX UNIT Input Conditions tR Input signal rise time 1(1) 5(1) ns tF Input signal fall time 1(1) 5(1) ns Output Condition CLOAD Output load capacitance 3 30 pF (1) Except when specified otherwise. 7.6.1.1 EMAC/Switch MDIO Electrical Data and Timing Table 7-6. Timing Requirements for MDIO_DATA (see Figure 7-3) NO. MIN TYP MAX UNIT 1 tsu(MDIO-MDC) Setup time, MDIO valid before MDC high 90 ns 2 th(MDIO-MDC) Hold time, MDIO valid from MDC high 0 ns Figure 7-3. MDIO_DATA Timing - Input Mode Table 7-7. Switching Characteristics for MDIO_CLK (see Figure 7-4) NO. PARAMETER MIN TYP MAX UNIT 1 tc(MDC) Cycle time, MDC 400 ns 2 tw(MDCH) Pulse duration, MDC high 160 ns 3 tw(MDCL) Pulse duration, MDC low 160 ns 4 tt(MDC) Transition time, MDC 5 ns |
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