ThunderLAN

™ TNETE100A

PCI ETHERNET

™ CONTROLLER

SINGLE-CHIP 10 BASE-T WITH MII FOR 100 BASE-T/100VG-AnyLAN

SPWS021B – OCTOBER 1995 – REVISED NOVEMBER 1996

20

POST OFFICE BOX 1443

timing requirements for management data I/O (MDIO) (see Figure 6)

MIN

MAX

UNIT

ta(MDCLKH-MDIOV) Access time, MDIO valid from MDCLK high (see Note 22)

0

300

ns

switching characteristics for management data I/O (MDIO) (see Figure 3 and Figure 7)

PARAMETER

MIN

MAX

UNIT

td(MDIOV-MDCLKH)

Delay time, MDIO valid to MDCLK high (see Note 23)

10

ns

td(MDCLKH-MDIOX) Delay time, MDCLK high to MDIO changing (see Note 23)

10

ns

NOTES: 22. When the MDIO signal is sourced by the PMI /PHY, it is sampled by TNETE100A synchronous to the rising edge of MDCLK.

23. MDIO is a bidirectional signal that can be sourced by TNETE100A or the PMI /PHY. When TNETE100A sources the MDIO signal,

TNETE100A asserts MDIO synchronous to the rising edge of MDCLK.

ta(MDCLKH-MDIOV)

MDCLK

MDIO

Figure 6. Management Data I/O Timing (Sourced by PHY)

td(MDIOV-MDCLKH)

td(MDCLKH-MDIOX)

MDCLK

MDIO

Figure 7. Management Data I/O Timing (Sourced by TNETE100A)