L80223 LSI, L80223 Datasheet - Page 42

• Manufacturer Part Number: L80223
• Manufacturer: LSI

Specifications of L80223

• Lead Free Status / RoHS Status: Not Compliant

2-24
the template specified in IEEE 802.3 and shown in
diagram contrasting NLPs and FLPs is shown in
Figure 2.7
TX_DI
TX_DI
To enable AutoNegotiation for a channel, assert the AutoNegotiation pin
(ANEG), or set the AutoNegotiation Enable (ANEG_EN) bit in the MI
serial port Control register (register 0). If AutoNegotiation is enabled, any
of the following events initiates the AutoNegotiation algorithm for the
channel:
Once a negotiation has been initiated, the device first determines if the
remote device has AutoNegotiation capability. If the remote device is not
AutoNegotiation-capable and is just transmitting either 10BASE-T or
100BASE-TX signals, the device senses it and places itself in the same
mode as the remote device. If the device detects FLPs from the remote
device, the remote device is determined to have AutoNegotiation
capability, and the device then uses the value from the PHY
AutoNegotiation Advertisement for that port to advertise its capabilities to
Functional Description
Power up
Device reset
Channel enters the Link Fail state
AutoNegotiation Enable (ANEG_EN) bit in the MI serial port Control
register for that port is cleared, then set
AutoNegotiation Reset (ANEG_RST) bit in the MI serial port Control
register is set
NLP vs FLP Link Pulse
Clock Clock Clock Clock Clock Clock Clock
Data Data Data Data Data Data
D0
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Normal Link Pulse (NLP)
Fast Link Pulse (FLP)
D1
D2
D3
D14 D15
Figure
Figure
2.7.
2.6. A timing