TNETX3270
ThunderSWITCH 24/3 ETHERNET SWITCH
WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS
SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999
60 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
serial MII management interfacetiming requirements (see Figure 20)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 20)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 92
3
7 10
8
4
5Z
Z
Z
Read InputWrite Output
11