AX88850

PRELIMINARY

ASIX ELECTRONICS CORPORATION

24

3.11 LED Interface

AX88850 provides per-port LED status indication for partition, jabber, link/activity and support rate-based LED for

global utilization (%) and global collision frequency (%). Detail function is described on previous pin description

(LED interface). LED[7:0] are all active low.

3.11.1 LED Status Driver wave-form for AX88851

P0

J0

A0

C4

C0

P10

J10

A10

RID0

CC0

no useful phase

LED_SYN

LED[0]

P1

J1

A1

U4

C1

P11

J11

A11

RID1

CC1

no useful phase

LED[1]

P2

J2

A2

A8

C2

P12

J12

A12

RID2

CC2

no useful phase

LED[2]

P3

J3

A3

A9

C3

P13

J13

A13

RID3

CC3

no useful phase

LED[3]

P4

J4

A4

J8

U0

P14

J14

A14

RID4

UU0

no useful phase

LED[4]

P5

J5

A5

J9

U1

P15

J15

A15

UU1

no useful phase

LED[5]

P6

J6

A6

P8

U2

P16

J16

A16

CC4

UU2

no useful phase

LED[6]

P7

J7

A7

P9

U3

P17

J17

A17

UU4

UU3

no useful phase

LED[7]

P0

J0

A0

C4

P1

J1

A1

U4

P2

J2

A2

A8

P3

J3

A3

A9

P4

J4

A4

J8

P5

J5

A5

J9

P6

J6

A6

P8

P7

J7

A7

P9

D0

D1

D2

D3

D4

D5

D6

D7

D8

D9

D10 ~ D15

D0

D1

D2

D3

"0"

Note 1 :

a.

P17~0 indicates partition status for each port

b.

J17~0 indicates jabber status for each port

c.

L17~0 indicates link status for each port

d.

A17~0 indicates activity status for each port

e.

RID4~0 is the ID number of repeater chip

f.

The LED display support two estimations:C4~0 and CC4~0 which indicate global collision rate for

each 104.8ms sampling period. Users can choose any one presentation.

g.

The LED display support two estimations:U4~0 and UU4~0 which indicate global utilization rate for

each 104.8ms sampling period. Users can choose any one presentation.

Note 2 : Reference port map as following table (Using per port Carrier Sense / Receive Signal Detect to identify port

number).

AX88851

Port[7:0] == M0_CRS[7:0]

Port[9:8] == CRS[1:0]

Port[17:10] == M1_CRS[7:0]

AX88852

Port[3:0] == M0_CRS[3:0]

Port[9:8] == CRS[1:0]

Port[7:4] == M1_CRS[3:0]

AX88853

Port[7:0] == RSD[7:0]

Port[9:8] == CRS[1:0]

AX88854

Reference to AX88851/AX88853 depended on MEDIA setting.