Datasheet

BUF08821EVM-USB Hardware Overview

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3.3 Connecting the Hardware

To connect the two PCBs of the BUF08821EVM-USB together, gently push on both sides of the DSUB

connectors (as shown in Figure 6). Note that the USB_DIG_Platform board has two DSUB connectors;

either may be used. Make sure that the two connectors are completely pushed together; loose

connections may cause intermittent operation.

3.4 Connecting Power

After the two parts of the BUF08821EVM-USB are conjoined, connect a +9V wall supply to the

USB_DIG_Platform board, as Figure 6 shows. Always connect power before connecting the USB cable. If

you connect the USB cable before connecting the power, the computer will attempt to communicate with

an unpowered device that will not be able to respond.

In addition, the BUF08821EVM-USB also requires an external power source. This source is not included

with the kit. Its voltage may differ depending on your testing needs, and it will be connected to the terminal

T1.

Figure 6. Connecting External Power to the EVM

BUF08821EVM-USB User Guide and Software Tutorial SBOU095–March 2011

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