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BUF20800/20820EVM Hardware Overview
3.3
Connecting the Hardware
To connect the two PCBs of the BUF20800/20820EVM together, gently push on both sides of the DSUB
connectors (as shown in
). 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 BUF20800/20820EVM are conjoined, connect a +6V wall supply to the
USB_DIG_Platform board, as
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 BUF20800/20820EVM 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
9
SBOU100 – April 2011
BUF20800/20820EVM User Guide and Software Tutorial
© 2011, Texas Instruments Incorporated
