82563EB datasheet(36/52 Pages) INTEL

36 / 52 page

82563EB/82564EB Gigabit Platform LAN Connect Networking Silicon

4.6.3.1

Electrical Idle Detection

The 82563EB/82564EB detects that the 631xESB/632xESB has gone into electrical idle when it

senses that the differential voltage has gone below and is remaining below a threshold voltage.

Note:

When the differential peak to voltage is below 65 mV (37.5 mV differential peak), the 82563EB/

82564EB detects that the 631xESB/632xESB has gone into electrical idle. This voltage

corresponds to the minimum output voltage in Electrical Idle plus some noise margin.

When the differential peak to peak voltage is above 200 mV (100 mV differential peak), the

82563EB/82564EB detects that the 631xESB/632xESB is not in electrical idle. This voltage

corresponds to the minimum valid receive level.

4.6.3.2

Electrical Idle Output

The following parameters relate to electrical idle output and the transition into and out of electrical

idle.

Table 29. Kumeran (Serial) Electrical Idle Detection

Symbol

Parameter

Min

Typ

Max

Unit

VRX_IDLE_DET_DIFFp-p

Voltage range to detect electrical idle (differ-

ential peak to peak)

200

VRX_IDLE_DET_DIFFp

Voltage range to detect electrical idle (differ-

ential peak to peak)

37.5

100

Table 30. Kumeran (Serial) Electrical Idle Output

Symbol

Parameter

Min

Typ

Max

Unit

VTX_IDLE_DIFFp

Electrical Idle peak output voltage.

VTX_IDLE_MON

Minimum time spent in electrical idle.

400

100

VTX_IDLE_SET_TO_IDLE

Maximum time for to transition to a valid

electrical idle after electrical idle detected.

1ms

TTX_IDLE_TO-DIFF-DATA

Maximum time to transition to valid transmit

after leaving electrical idle.

340

µs

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