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LXD9781 PQFP Demo Board
3.0
Quick-Start Checklist
Use this quick-start procedure for easy setup of the LXD9781 demo board. This procedure sets all
ports to the default condition (Auto-Negotiation enabled, advertising dual-speed and full-duplex
capabilities).
1. Set the jumpers in accordance with
2. Set switch S1 in accordance with
3. Connect the eight demo board MII ports to the SmartBits test box via MII connector/cables.
Male-to- male connectors are required to interface the SmartBits test box to the LXD9781 and
are available from Newark (.5m cable - Newark P/N 91F9746).
4. Connect the twisted-pair ports to external NIC cards via UTP cables. Each NIC card plugs
directly into the SmartBits test box.
5. Connect a +3.3V DC power supply to VCC, VCCD, and VCCIO. Connect all three power
supply return lines to GND.
6. With the demo board appropriately configured, apply power to the LXD9781 and press Reset
switch S3.
7. Proceed with evaluation as desired.
Table 1.
Quick-Start Jumper Settings
Jumper / Label
JP2 / MDIO
JP3 / MDC
JP29
JP63 / EXT_OSC
JP64 / DIV 2
JP65 / Manual Port Speed
JP39 - JP62 / CFG BITS 1-3
JP66 - JP70 / ADD_0-4
Table 2.
Quick-Start Switch Settings
Switch / Label
S1-1 / TXSLEW_0
S1-2 / TXSLEW_1
S1-3 / PAUSE_0
S1-4 / PWRDWN
S1-5 / MDDIS
S1-6 / CIMENA
10
Table
Table
2.
Setting
Jumper
Route MDIO through MII Port 0.
pins 2 - 3
Jumper
Route MDC through MII Port 0.
pins 2 - 3
Jumpered
Supply 3.3V to magnetic center-taps.
Open
Use on-board oscillator for Quick Status clock.
Jumpered
Divide quick status clock by 2.
Open
Set Eprom Speed Select to Automatic.
Jumper
Set Port Configuration to Auto-Negotiation, 10/100, Full-Duplex.
pins 1 - 2
Open
Set MII base address to 00000.
Setting
0
Set output driver slew rate to 3.7 ns.
1
0
Disable Pause function.
0
Disable Power-down function.
0
Enable MDIO channel.
0
Normal Operation.
1.
Configuration
Configuration
Developer Manual
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