Texas Instruments DP83849IFVS Basic product evaluation and customer demo board with FX DP83849IFVS-EVK/NOPB DP83849IFVS-EVK/NOPB Scheda Tecnica
Codici prodotto
DP83849IFVS-EVK/NOPB
October 2006
Tung Ngo
v1.1
National Semiconductor Corp
1
DP83849IFVS-EVK Purpose and Contents
The purpose of the DP83849IFVS-EVK (EVK) is to provide National Semiconductor Corp.'s customers with
a vehicle to quickly design and market systems containing the DP83849IFVS. Customers are encouraged
to copy EVK components to expedite their design process.
The EVK contains:
a vehicle to quickly design and market systems containing the DP83849IFVS. Customers are encouraged
to copy EVK components to expedite their design process.
The EVK contains:
• DP83849 Demo II board
• Printed copy of this User's Guide
• DP83849 Demo II schematic
• DP83849 Demo II licensing agreement
• Printed copy of this User's Guide
• DP83849 Demo II schematic
• DP83849 Demo II licensing agreement
Information and Specifications
This section contains specifications of the DP83849 Demo II board, as well as a description of the board’s
interfaces, connectors, jumpers and LEDs.
interfaces, connectors, jumpers and LEDs.
Usage setup and configuration
Power for the DP83849 is supplied through the MII connector or via a POE Power Supply Equipment (PSE)
device through the RJ-45 connector for
device through the RJ-45 connector for
PORT A
, pins: (+) for 1, 2, 4, 5 and (-) for 3, 6, 7, 8.
1. MII connection:
Need to install J8, J10, and J92.
For MII with 5V supply: Need to install J23. A voltage regulator, U3, will convert the MII 5V
connection to 3.3V for the device.
For MII with 3.3V supply: Remove J23. No voltage regulator is used; supply is connected to
3.3V plane via J92 for the device.
For MII with 5V supply: Need to install J23. A voltage regulator, U3, will convert the MII 5V
connection to 3.3V for the device.
For MII with 3.3V supply: Remove J23. No voltage regulator is used; supply is connected to
3.3V plane via J92 for the device.
2. PSE device through pins: (+) for 1, 2, 4, 5 and (-) for 3, 6, 7, 8 of J85 (RJ-45 connector for
PORT A). A separate daughter board with POE circuit is required to connect to the POE
connector, J91. The module will detect and convert the voltage to 3.3V for the device. Need to
populate 0 ohm resistors (R226, R227, R228, and R229). Remove J8, J23, and J92.
Require a separate baby board that connects to the POE connector, J91.
Note: Only use PORT A for PSE connection. Operation has been proven with 48V @ 4A
supply when R161, R162, R163, R164 are 75 ohm resistors while powering through pins: (+)
4,5 and (-) 7,8.
connector, J91. The module will detect and convert the voltage to 3.3V for the device. Need to
populate 0 ohm resistors (R226, R227, R228, and R229). Remove J8, J23, and J92.
Require a separate baby board that connects to the POE connector, J91.
Note: Only use PORT A for PSE connection. Operation has been proven with 48V @ 4A
supply when R161, R162, R163, R164 are 75 ohm resistors while powering through pins: (+)
4,5 and (-) 7,8.
3. External 3.3V power supply: Remove jumper J92 and use pin 1, labeled as 3V3, for (+) plus
and pick the nearest ground pin for (-) connections.
To access the device registers
1. Access MDIO through SmartBits with one of the ports:
Add jumpers to J1 pins (1-2, 4-5, 7-8) for access through PORT A.
Add jumpers to J1 pins (2-3, 5-6, 8-9) for access through PORT B.
Add jumpers to J1 pins (2-3, 5-6, 8-9) for access through PORT B.