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LevelOne LXD970A User Manual Download Page 10

LXD970A Demo Board for 10/100 and 100BASE-FX applications

10

REVISION HISTORY

Table 8: Changes From Revision 1.2 to Revision 1.3 (11/98)

Section

Page

Change

Text

All

1 - 9

Update

Update entire document to LXD970A and LXT970A.

Loading Test File

2

Update

Change killer packet test file name to (100Tx4.s).

Power Supply 

Option

3

Update

Delete external 3.3V supply option for VCCI/O.

Table 2

Jumper 

Descriptions

4

Update

Delete JP2. This jumper was removed from the demo 
board.

Table 9: Changes From Revision 1.1 to Revision 1.2 (11/97)

Section

Page

Change

Text

Loading Test File

2

Update

Change killer packet test file name to (BLWANDER.S).

Table 10: Changes From Revision 1.0 to Revision 1.1 (07/97)

Section

Page

Change

Text

Table 6

8

Update

Change MDDIS function status to:
Enabled when jumper is removed .
Disabled when jumper is installed.

Summary of Contents for LXD970A

Page 1: ...ing The LXT970A also provides an ECL type interface for 100BASE FX link testing This document describes typical Demo Board setup procedures for a 100BASE TX environment Before using the Demo Board review the LXT970A Fast Ethernet Transceiver data sheet for device functionality and specifications IEEE 802 3 compliant 10BASE T and 100BASE TX using a single RJ45 connection Quick setup ease of use and...

Page 2: ... Test File A disk that contains the file needed for testing is included with the LXD970A demo board This file contains Killer Packets 100Tx4 s that exhibit worst case baseline wander characteristics suitable for evaluating link performance and comparing the LXT970A to alternative products Some devices do not adjust well over a range of cable distances It is recommended to compare LXT970A performan...

Page 3: ...to JP8 pin 3 This routes the external supply to VCCA VCCT and VCCR all circuits except VCCD and VCCIO To restore to factory configuration disconnect the external power supply and install the jumper block in JP8 Test Points There are 9 Test Points on the LXD970A Demo Board Table 1 describes these Table 1 Test Point Descriptions Label Ref Des Description TD J3 Transmit Data Output Positive Signals t...

Page 4: ...a test mode that is used to characterize the chip JP6 POWER DOWN With the jumper installed the chip goes into a power down mode In power down mode the MII port except MDIO and MDC the twisted pair port and the LED pins are tristated JP7 MII 18 pin straight header that is connected to all the MII interface signal pins There is a ground test point next to C20 to ground probes to JP8 ANALOG VCC CONNE...

Page 5: ... 4 level input pins VMF1 VMF2 VMF3 and VMF4 are identical for each Multi Function MF section See Figure 3 for jumper placement Figure 3 Hardware Control Interface Jumper Placement Table 3 MF Pins Input Voltage Levels Parameter Symbol Min Max Units Input Voltage Level 1 VMF1 Vcc 0 5 V Input Voltage Level 2 VMF2 Vcc 2 0 5 Vcc 1 2 V Input Voltage Level 3 VMF3 1 2 Vcc 2 0 5 V Input Voltage Level 4 VMF...

Page 6: ...ed 0 12 0 MF1 Address Bit 1 1 1 0 0 Repeater DTE Mode Sets the initial value of bit 19 13 DTE 19 13 0 Repeater 19 13 1 Repeater 19 13 1 DTE 19 13 0 MF2 Address Bit 2 1 1 0 0 Nibble 4B Symbol 5B Mode Sets the initial value of bit 19 4 Nibble 4B 19 4 0 Symbol 5B 19 4 1 Symbol 5B 19 4 1 Nibble 4B 19 4 0 MF3 Address Bit 3 1 1 0 0 Scrambler Operation Sets the initial value of bit 19 3 Enabled 19 3 0 By...

Page 7: ...otiate Enabled via MF0 VMF1 VMF4 Jumper Not Installed Advertise all capabilities Ignore MAN1 FDE VMF1 VMF4 Jumper Installed Advertise 10 Mbps only Follow MAN1 FDE VMF2 VMF3 Jumper Not Installed Advertise 100 Mbps only Follow MAN1 FDE VMF2 VMF3 Jumper Installed Advertise 10 100 Mbps Follow MAN1 FDE 1 Input Voltage Levels VMF1 VMF2 VMF3 VMF4 for MF pins ...

Page 8: ...otiation when Auto Neg enabled 1 Enable X Disable X Speed Select when Auto Neg disabled 1 10Mbps X 100Mbps X MAN1 FDE Full Duplex Enable X Disable X MAN2 CFG1 Speed Advertisement Capabilities when Auto Neg enabled 1 When Auto Neg enabled MAN2 CFG1 works in combination with MF4 to control operating speed advertising capabilities See Table 5 for details Link Test when Auto Neg disabled 1 Enable X Di...

Page 9: ...9 LXD970A Demo Board Hardware Control Interface Figure 4 LXD970A Schematic ...

Page 10: ... Option 3 Update Delete external 3 3V supply option for VCCI O Table 2 Jumper Descriptions 4 Update Delete JP2 This jumper was removed from the demo board Table 9 Changes From Revision 1 1 to Revision 1 2 11 97 Section Page Change Text Loading Test File 2 Update Change killer packet test file name to BLWANDER S Table 10 Changes From Revision 1 0 to Revision 1 1 07 97 Section Page Change Text Table...

Page 11: ...11 LXD970A Demo Board Notes NOTES ...

Page 12: ...al Office Northern Europe Regional Office 4020 WestChase Blvd Suite 100 Raleigh NC 27607 USA Tel 919 836 9798 Fax 919 836 9818 28203 Cabot Road Suite 300 Laguna Niguel CA 92677 USA Tel 714 365 5655 Fax 714 365 5653 Nishi Shinjuku Mizuma Building 8F 3 3 13 Nishi Shinjuku Shinjuku Ku Tokyo 160 0023 Japan Tel 81 3 3347 8630 Fax 81 3 3347 8635 Torshamnsgatan 35 164 40 Kista Stockholm Sweden Tel 46 8 7...

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