TNETE2008

OctalPHY

EIGHT 10BASE-T PHYSICAL-LAYER INTERFACES

SPWS042B – DECEMBER 1997 – REVISED JUNE 1998

12

POST OFFICE BOX 655303

LED status indication

The TNETE2008 has 7 pins that drive 24 LEDs in a multiplexed format, as shown in Figure 4.

LSEL6, 7

LSEL4, 5

LSEL2, 3

LSEL0, 1

LDUPCOL

LACTIVE

LLINK

DUPCOL6

DUPCOL7

DUPCOL5

DUPCOL4

DUPCOL2

DUPCOL3

DUPCOL0

DUPCOL1

ACTIVE0

ACTIVE2

ACTIVE3

ACTIVE4

ACTIVE5

ACTIVE6

ACTIVE7

LINK0

LINK2

LINK3

LINK4

LINK5

LINK6

LINK7

ACTIVE1

LINK1

180

Ω

180

Ω

180

Ω

180

Ω

Figure 4. LED External Connection

status LED states

LINK LED

Illuminates when its PHY has established a valid link. The LED flashes at 2 Hz during

autonegotiation.

ACTIVE LED

Illuminates when its PHY is transmitting or receiving data. The LED flashes at 19 Hz during

continuous activity.

DUPCOL LED

Illuminates continuously when its PHY is in full-duplex mode and illuminates for a minimum

duration of 20 ms when collisions occur in half-duplex mode. In the event of continuous or

frequent collisions, this LED flashes at 19 Hz. In jabber mode it flashes at 1 Hz.