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TNETX3110 数据表(PDF) 59 Page - Texas Instruments |
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TNETX3110 数据表(HTML) 59 Page - Texas Instruments |
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59 / 65 page ![]() TNETX3110 ThunderSWITCH ™ 8/3 ETHERNET™ SWITCH WITH 8 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS SPWS047A – MARCH 1998 – REVISED APRIL 1999 59 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 serial MII management interface timing requirements (see Figure 19) NO. MIN MAX UNIT 1 tsu(MDIO) Setup time, MDIO valid before OSCIN ↑, read 7 ns 2 th(MDIO) Hold time, MDIO valid after OSCIN ↑, read 3 ns operating characteristics over recommended operating conditions (see Figure 19) NO. PARAMETER MIN MAX UNIT 3 td(MDIO) Delay time, from OSCIN ↑ to MDIO valid, write 11 ns 4 td(MDCLK) Delay time, from OSCIN ↑ to MDCLK↑ 11 ns 5 td(MRESET) Delay time, from OSCIN ↑ to MRESET↓ 11 ns 6 tdis(MDIO) Disable time, from OSCIN ↑ to after MDIO to Z state, read 11 ns 7 tdis(MDCLK) Disable time, from OSCIN ↑ to after MDCLK to Z state 11 ns 8 tdis(MRESET) Disable time, from OSCIN↑ to after MRESET to Z state 11 ns 9 ten(MDIO) Enable time, from OSCIN ↑ to before MDIO valid 11 ns 10 ten(MDCLK) Enable time, from OSCIN ↑ to before MDCLK valid 11 ns 11 ten(MRESET) Enable time, from OSCIN ↑ to before MRESET valid 11 ns OSCIN (input) MDCLK (output) MRESET (output) MDIO (input/ output) 1 6 9 2 3 7 10 8 4 5 Z Z Z Read Input Write Output 11 Figure 19. Serial MII Management Read/Write Cycle |
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