AC207-DS04-405-R datasheet(25/60 Pages) BOARDCOM

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Preliminary Data Sheet

AC207

07/08/02

B roa dcom

Document

AC207-DS04-405-R

Pin Descriptions

Page 15

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. 48 LED outputs are available through an 6x8 matrix.

Table 9: 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 out-

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

section.

LED_LN*[5]: Display 10BT 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. Ac-

tive high output.

Table 10: Configuration and Set-up

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[3:2] MII

MII

7-wire

not used

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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