AC206-DS05-405-R datasheet(29/70 Pages) BOARDCOM

29 / 70 page

Preliminary Data Sheet

AC206

07/08/02

B roa dcom

Document

AC206-DS05-405-R

Pin Descriptions

Page 17

LED DISPLAY/CONFIGURATION/PROM INTERFACE

The LED pins are shared with reset-read configuration pins, test pins and EEPROM interface. The value applied on the

reset-read pins is only valid at the end of the reset cycle. The EEPROM interface is active after the reset cycle. Once the

data in the EEPROM is read, the same pins are used for LED display. Forty-eight LED outputs are available through an 6x8

matrix.

Table 12: LED Pins

Pin Name

Pin #

Type

Description

LED_LN[5]

LED_LN[4]

LED_LN[3]

LED_LN[2]

LED_LN[1]

LED_LN[0]

48 mA

Enable corresponding LED display line in the display matrix, active low

output. The detail of how to program and connect the LEDs is in the LED

Setup section.

LED_LN*[5] = Display 10BASE-T Collision rate and segment collision

status.

LED_LN*[4] = Display 100 Mbps Collision rate and segment collision

status

LED_LN*[3] = Display 10M segment utilization rate

LED_LN*[2] = Display 100M segment utilization rate

LED_LN*[1] = Programmable LED display. The default is to display 10M

Link/Activity information of each port.

LED_LN*[0] = Programmable LED display. The default is to display 100M

Link/Activity information of each port.

LED_D[7]

LED_D[6]

LED_D[5]

LED_D[4]

LED_D[3]

LED_D[2]

LED_D[1]

LED_D[0]

125

124

123

122

121

120

119

118

I/O, D

Output for LED display information of each column in the display matrix.

Active high output.

Table 13: Configuration and Setup

Pin Name

Pin #

Type

Description

Mode[3] (MII_RXD2)

Mode[2] (LED_D[4])

Mode[1] (LED_D[1])

Mode[0] (LED_D[0])

122

119

118

I,D

Mode[1:0]

Domain A

Domain B

100M Rptr

10M Rptr (Master)

100M Rptr

10M Rptr (Slave, Bridge disable)

100M

Port 5

Reserved

Mode[3:2]

Digital Interface

MII

7-wire

Reverse MII

TP125 (MII_RXD1)

1:select 1:1.25 xformer

ChipID[1] (LED_D[2]) Chip-

ID[0] (LED_D[3])

120

121

I,D

The device must be assigned with ChipID=0

IBREF

112

Reference bias resistor. Connected to analog ground through a

10K (1%) resistor.

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