AC208-DS03-R datasheet(15/58 Pages) BOARDCOM

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Preliminary Data Sheet

AC208

07/08/02

B roa dcom

Document

AC208-DS04-405-R

Initialization and Setup

Page 7

INITIALIZATION AND SETUP

HARDWARE CONFIGURATION

Several different states of operation can be chosen through hardware configuration. External pins may be pulled high or low

at reset time. The combination of high and low values determines the power on state of the device.

Many of these pins are multi-function pins which change their meaning when reset ends.

SOFTWARE CONFIGURATION

Several different states of transceiver operation may be chosen through the MDC/MDIO interface. For details, see “Register

Descriptions” on page 18.

LEDS

Using an LED display matrix with a refresh technique, only 16 pins are required to drive up to 48 LEDs with unique

information. On, Off, and Flash states are used to indicate different information. With a reduced number of signals, the LED

display is easier to route on the board, and less costly. The active-low LED data is driven out of LED_D[0:7] pins for each

port and the corresponding LED functions are LED_LN[5:0] pin. For details, see “LED Display/Configuration/PROM

Interface” on page 16 and “LED Display Matrix” on page 38.

The AC208 supports two LEDs per port. The following table describes how each of the LED is connected.

Signals LED_D[0:7] are indicators of port 1 through 8. Signals LED_LN[0:5] are events driven of port 1 through 8.

AC208-DS03-R 数据表(PDF) 15 Page - Broadcom Corporation.