82583V Datasheet, PDF (168/374 Pages) Intel Corporation – Intel® 82583V GbE Controller

82583V GbE Controller—Inline Functions
Note:
Each of the three LED's might be configured to use one of a variety of sources for
output indication. The Mode bits control the LED source:
• LINK_100/1000 is asserted when link is established at either 100 or 1000 Mb/s.
• LINK_10/1000 is asserted when link is established at either 10 or 1000 Mb/s.
• LINK_UP is asserted when any speed link is established and maintained.
• ACTIVITY is asserted when link is established and packets are being transmitted or
received.
• LINK/ACTIVITY is asserted when link is established AND there is NO transmit or
receive activity
• LINK_10 is asserted when a 10 Mb/s link is established and maintained.
• LINK_100 is asserted when a 100 Mb/s link is established and maintained.
• LINK_1000 is asserted when a 1000 Mb/s link is established and maintained.
• FULL_DUPLEX is asserted when the link is configured for full duplex operation.
• COLLISION is asserted when a collision is observed.
• PAUSED is asserted when the device's transmitter is flow controlled.
• LED_ON is always asserted; LED_OFF is always de-asserted.
The IVRT bits enable the LED source to be inverted before being output or observed by
the blink-control logic. LED outputs are assumed to normally be connected to the
negative side (cathode) of an external LED.
The BLINK bits control whether the LED should be blinked while the LED source is
asserted, and the blinking frequency (either 200 ms on and 200 ms off or 83 ms on and
83 ms off)¹. The blink control can be especially useful for ensuring that certain events,
such as ACTIVITY indication, cause LED transitions, which are sufficiently visible to a
human eye. The same blinking rate is shared by all LEDs.
Note that the LINK/ACTIVITY source functions slightly different from the others when
BLINK is enabled. The LED is off if there is no LINK, on if there is LINK and no
ACTIVITY, and blinking if there is LINK and ACTIVITY.
1. While in Smart Power Down mode, the blinking durations are increased by 5x to 1 second and
415 ms, respectively.
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