ThunderLAN

™ TNETE110A

PCI ETHERNET

™ CONTROLLER

SINGLE-CHIP 10 BASE-T

SPWS022A – APRIL 1996 – REVISED NOVEMBER 1996

18

POST OFFICE BOX 1443

timing requirements for management data I/O (MDIO) (see Figure 3 and Figure 5)

MIN

MAX

UNIT

ta(MDCLKH-MDIOV) Access time, MDIO valid from MDCLK high (see Note 20)

0

300

ns

switching characteristics for management data I/O (MDIO) (see Figure 6)

PARAMETER

MIN

MAX

UNIT

tsu(MDIOV-MDCLKH) Setup time, MDIO valid to MDCLK high (see Note 21)

10

ns

th(MDCLKH-MDIOX)

Hold time, MDCLK high to MDIO changing (see Note 21)

10

ns

NOTES: 20. When the MDIO signal is sourced by the PMI /PHY, it is sampled by TNETE110A synchronous to the rising edge of MDCLK.

21. MDIO is a bidirectional signal that can be sourced by TNETE110A or the PMI /PHY. When TNETE110A sources the MDIO signal,

TNETE110A asserts MDIO synchronous to the rising edge of MDCLK.

ta(MDCLKH-MDIOV)

MDCLK

MDIO

Figure 5. Management Data I/O Timing (Sourced by PHY)

tsu(MDIOV-MDCLKH)

th(MDCLKH-MDIOX)

MDCLK

MDIO

Figure 6. Management Data I/O Timing (Sourced by TNETE110A)