TNETE211

ThunderLAN

™ TO IEEE 802.12 PHYSICAL MEDIA DEPENDENT INTERFACE FOR

100VG-AnyLAN

SPWS019 – MAY 1995

10

POST OFFICE BOX 655303

POST OFFICE BOX 1443

MDIO timing requirements

MIN

MAX

UNIT

td(MDCLKH-MDIOV) Delay time, MDIO valid from MDCLK high (see Note 6)

0

25

ns

MDIO switching characteristics

PARAMETER

MIN

MAX

UNIT

tsu(MDIOV-MDCLKH) Setup time, MDIO valid to MDCLK high (see Note 7)

15

ns

th(MDCLKH-MDIOX) Hold time, MDCLK high to MDIO changing (see Note 7)

15

ns

NOTES:

6. When the MDIO signal is sourced by the PMI, it is sampled by TNETE100 synchronous to the rising edge of MDCLK.

7. MDIO is a bidirectional signal that can be sourced by TNETE100 or the PMI.

td(MDCLKH-MDIOV)

MDCLK

MDIO

Figure 4. Management Data I/O Timing (Sourced by PMI)

tsu(MDIOV-MDCLKH)

th(MDCLKH-MDIOX)

MDCLK

MDIO

Figure 5. Management Data I/O Timing [Sourced by Station Management Entity (STA)]