Texas Instruments BUF08821EVM-USB BUF08821EVM-USB BUF08821EVM-USB Datenbogen
Produktcode
BUF08821EVM-USB
V
=
CHANNEL
V
Code
1024
SUP
´
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BUF08821EVM-USB Software Overview
5.2
Using the BUF08821 Software
5.2.1
I
2
C Address Selection
As mentioned previously in the BUF08821EVM-USB Features section (see
), jumper JMP5 is
used to set the I
2
C address pin of the BUF08821.
shows how the hardware and software must
both be set to allow for communication between the BUF08821EVM-USB and the software. Without
jumper JMP5 and the software address button configured correctly, the software will not be able to
communicate with the BUF08821 device.
jumper JMP5 and the software address button configured correctly, the software will not be able to
communicate with the BUF08821 device.
Figure 15. JMP5 Setting For Logic ‘0’
5.2.2
Measuring the Power Supply
You must measure the power supply (V
S
) with respect to the GND on the BUF08821EVM-USB board and
enter it in the V
SUP
field located in the top section of the software interface, as shown in
Figure 16. Measuring and Entering Power-Supply Voltage
The voltages calculated for each channel are based on the value entered as V
SUP
, as shown in
.
Note that Code is the value found in the channel registry converted to a decimal value.
(1)
5.2.3
Read DAC Button
By pressing the Read DAC button in the BUF08821EVM-USB software, all of the BUF08821 DAC/V
COM
registers are read to obtain the respective current register contents. Once the read procedure is complete,
all of the corresponding text boxes are updated to show the current values present in the DAC/V
all of the corresponding text boxes are updated to show the current values present in the DAC/V
COM
registers.
17
SBOU095 – March 2011
BUF08821EVM-USB User Guide and Software Tutorial
© 2011, Texas Instruments Incorporated