DM9081 Ver la hoja de datos (PDF) - Davicom Semiconductor, Inc.

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componentes Descripción

Fabricante

DM9081

10 BASE-T hub controller

Davicom Semiconductor, Inc. 

DM9081

10BASE-T Hub Controller

Pin Description

Pin No.

Pin Name

I/O

Description

Miscellaneous

3, 4, 9,

DVDD

P Digital Power

30, 40,

50, 83, 93

14, 21,

DGND

P Digital Ground

35, 45,

88, 98

18

RESET#

I Active low to reset the internal logic of DM9081. It should be

synchronized to X2 if multiple DM9081s

are used

20, 19

TESTPIN0

I These two pins are used to select LED display mode. Normal mode is

TESTPIN1

selected if both pins are connected to VDD. Minimum mode is selected

if both pins are connected to GND. Other settings are prohibited

26, 29

NC

- These pins should be left open

27

X2

I A 20MHz oscillator or crystal should be attached to this pin

28

X1

O This pin is used in crystal connection only. It is left open when using an

oscillator

67, 81

AVDD

P Analog Power

68, 82

AGND

P Analog Ground

LED Display Pins

5

LED_LATCH O This pin is used to latch the serial LED information from pins 6 to 13

(LI/RX7)

In minimum mode, this pin sends out TP7 Link and Carrier Sense

status

6

AUI_LED

O This pin transmits AUI port status synchronous to TCK

(LI/RX6)

In minimum mode, this pin sends out TP6 Link and Carrier Sense

status

7

TP_BIT_LED O This pin sends out global bit rate error status of the DM9081 Hub

(LI/RX5)

In minimum mode, this pin sends out TP5 Link and Carrier Sense

status

8

TP_POL_LED O In minimum mode, this pin sends out TP4 Link and Carrier Sense

(LI/RX4)

status

10

TP_JAB_LED O This pin transmits global jabber status of the DM9081 Hub

(LI/RX3)

In minimum mode, this pin sends out TP3 Link and Carrier Sense

status

11

TRAFFIC_LED O This pin sends out utilization of 10MHz bandwidth synchronous to TCK

(LI/RX2)

In minimum mode, this pin sends out TP2 Link and Carrier Sense

status

12

TP_PAR_LED O This pin sends out the partition status synchronous to TCK for the eight

(LI/RX1)

TP ports

In minimum mode, this pin sends out TP1 Link and Carrier Sense

status

13

TP_LINK_LED O This pin sends out the link and carrier sense status synchronous to

(LI/RX0)

TCK for the eight TP ports

In minimum mode, this pin sends out TP0 Link and Carrier Sense

status

15

AUI1_CRS_LED O Active low for 52ms when AUI Port 1 detects carrier

16

AUI2_CRS_LED O Active low for 52ms when AUI Port 2 detects carrier

17

COL_LED

O Active low for 26ms when collision is detected

25

TCK

O A 10MHz clock synchronous to X2

Final

5

Version: DM9081-DS-F02

February 02, 2001

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