VSC8221 datasheet(92/138 Pages) MICROSEMI

92 / 138 page

VSC8221

Data Sheet

VMDS-10106 Revision 4.1

December 2006

92 of 106

106

26.1 – MASTER/SLAVE Resolution Error interrupt Status

When a MASTER/SLAVE resolution error is detected, bit 26.1 is set to “1” if bit 25.1 is also set to “1”. This bit is automatically

cleared when read.

26.0 – RXER interrupt Status

When an RXER condition occurs, bit 26.0 is set to “1” if bit 25.0 is also set to “1”.This bit is automatically cleared when read.

23.2.28 Register 27 (1Bh) – LED Control Register

27.15:12 - Reserved

Bit

Name

Access

States

Reset

Value

Sticky

15:12 Reserved

CMODE

11:10 LED Pin 2 Configuration

R/W

00 = Link10/Activity

011 = Duplex/Collision

10 = Link/Activity

112 = Tx

1 This setting is ‘Force off’ when Mii Register 20E.13 is set.

2 This setting is ‘Force on’ when Mii Register 20E.13 is set.

CMODE S

9:8

LED Pin 1 Configuration

R/W

00 = Link100/Activity

01 = Link10/100/Activity

10 = Link/Activity

11 = Link100/1000/Activity

CMODE S

7:6

LED Pin 0 Configuration

R/W

00 = Link1000/Activity

01 = Link/Activity w/ Serial output on LED pins 1 and 2

10 = Fault

11 = Rx

CMODE S

LED Pulse-stretch Rate/ Blink

Rate

R/W

0 = 5 Hz blink rate/200 ms pulse-stretch

1 = 10 Hz blink rate/100 ms pulse-stretch

LED Pulsing Enable

R/W

1 = Enable 5 kHz, 20% duty cycle LED pulsing for

power savings

0 = LED pulsing disabled

LED Pulse-Stretch / Blink Select R/W

1 = Collision, Activity, Rx and Tx functions will flash at

a rate selected by Blink/Pulse-Stretch Rate bits

0 = Collision, Activity, Rx and Tx functions will blink at

a rate selected by Blink/Pulse-Stretch Rate bits

Link/Activity Behaviour

R/W

1 = Link function indicates link status only

0 = Link/Activity function will blink or flash when

activity is present. Blink/flash behavior is selected

by Pulse-Stretch Enable and Blink/Pulse-Stretch

Rate bits.

LED Linkxxxx/Activity3 Behavior

3 Linkxxxx/Activity stands for Link10/Activity,Link100/Activity,Link1000/Activity,Link10/100/Activity and Link100/1000/Activity. its definition does not include the Link/

Activity function.

R/W

1 = Link function indicates link status only

0 = All link functions will blink or flash when activity is

present. Blink/flash behavior is selected by Pulse-

Stretch Enable and Blink/Pulse-Stretch Rate bits.

LED Duplex/Collision Behavior

R/W

1 = Duplex function indicates duplex status only

0 = Duplex function will blink or flash when collision is

present

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