AC207-DS04-405-R datasheet(16/60 Pages) BOARDCOM

16 / 60 page

AC207

Preliminary Data Sheet

07/08/02

B roa dcom

Page 6

Initialization and Setup

Document

AC207-DS04-405-R

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. Refer to Section 3:

“Register Descriptions” on page 17.

LEDS

Using an LED display matrix with a refresh technique, only 14 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. Refer to “LED Display/Configuration/PROM Interface” on

page 15 and “LED Display Matrix” on page 34 for the details.

The AC207 supports 2 LEDs per port. The following table describes how each of the LED is connected.

Signals LED_D[2:6] are indicators of port 1 through 8. Signals LED_LN[0:5] are events driven of port 1 through 8.

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