lxt9785 Intel Corporation, lxt9785 Datasheet - Page 154

• Manufacturer Part Number: lxt9785
• Description: Advanced 8-port 10/100 Mbps Phy Transceivers
• Manufacturer: Intel Corporation

LXT9785 and LXT9785E Advanced 8-Port 10/100 Mbps PHY Transceivers
156
Figure 30. Intel
process. If each page is successfully auto-negotiated (it matches the transmitted page), DTE
Discovery completes as previously described. The five Next Pages consist of a message page and
four user pages.
LFIT Expired 27.2 = 1
Dis_EN 27.6 = 0
®
Compatibility
Determine Compatibility Options
LXT9785E Negotiation Flow Chart
Nonmatching DTE
Auto Negotiation
FLP Detected
Discovery NP
Received
Link Down 1.2 = 0
Auto-Neg 0.12 = 1
Dis_EN 27.6 = 1
Transmit Last Page Continuously
and
and
No
Power_EN 27.4 = 1
DTE Discovered
LFIT Expired 27.2 = 1
Dis_EN 27.6 = 1
Link Down 1.2 = 0 and Dis_EN 27.6 = 0
Link Down 1.2 = 0 and Forced Mode
No
Next Pages Received
Auto-negotiation 0.12 = 1 (if needed)
Use Random Data for User Defined
Pages = Code
Yes
Transmitted?
Transmit based upon hardware
FLP, NLP or IDLE Symbols
Next Page Transmission
with Next Page 4.15 = 1
Base Page (Register 4)
Software Intervention
Power Up
Power_EN 27.6 = 1
Discovery Base
Start
Transmit FLPs
FLP Detected
Default Mode
configuration
Bits as Code
or
or
Next Page
Set?
Yes
Link Up
Software Polled Power_EN 27.4 = 1
Yes
Turn On Power Supply
Software Intervention
Auto-Negotiation/Forced Speed Set by Pins
NLPs or IDLE Symbols
Advertisement Requirements Set by Pins
LFIT Expired 27.2 = 1
Dis_EN 27.6 = 1
Detected
NLPs or IDLE Symbols
Dis_EN Not Set 27.6 = 0
LFIT Expired 27.2 = 1
Detected
Link Fail Timeout = 1
Assumptions:
Negotiation?
Revision Date: August 28, 2003
Auto-
No
Document Number: 249241
Determine Compatibility on
Auto-Negotiation
Power Applied
Wait State for
Proper Power
Force Speed
Check Advertisement
Power On
Assertiion
Set Mode
Speed and Duplex
Parallel Detection
Restart
Revision Number: 007
or
Compatibility
Datasheet