Introduction
7
SNLU237 – September 2018
Copyright © 2018, Texas Instruments Incorporated
DP83869EVM User's Guide
2.2
Quick Setup
2.2.1
Onboard Power Supply Operation
The EVM can be supplied power through multiple options. Single-supply operation uses onboard LDOs to
generate the voltages required for operating various sections of the EVM (PHY, MSP430, FO transceiver,
and so forth).
Figure 3. Onboard Power Supply Connection
The EVM can be supplied power by either a J26 barrel jack connector, power-supply turrets, or a USB
•
For Barrel Jack and Turret, connect the jumper in the ON position to J22 and the jumper on 5V-LDO to
J34.
•
For USB power, connect the Jumper on 5V-USB position to J35. J23 is don’t care.
2.2.2
External Power Supply Operation
Figure 4. Jumper Placements for Onboard Power
The jumpers shown in
can be used to choose whether a particular voltage rail is supplied through
onboard LDOs or an external power supply. If an external power supply is desired on a voltage rail,
change its respective jumper from position 1-2 (LDO) to 2-3 (External). Then connect the appropriate
voltage on its corresponding pin to the P1 connector. For example, if the VDDA2P5 is to be supplied from
an external supply, then change jumper position of J36 from 1-2 to 2-3. Then connect the 2.5-V external
supply on pins 9-10 on the P1 connector. Note that pin 9 is supply and pin 10 is ground.
2.2.3
Software
The onboard MSP430 comes pre-programmed and ready to use. When using this EVM for the first time
on a Windows 7 (or above) PC, MSP430 drivers and USB2MDIO software utility will have to be installed.
The USB2MDIO software can be used for accessing registers.
2.2.3.1
MSP430 Driver
Install the latest MSP430 drive from this website:
dl.ti.com/msp430/msp430_public_sw/mcu/msp430/MSP430_FET_Drivers/latest/index_FDS.html
.
