DAC121C08XEB/NOPB National Semiconductor, DAC121C08XEB/NOPB Datasheet - Page 8

• Manufacturer Part Number: DAC121C08XEB/NOPB
• Description: BOARD EVAL FOR DAC121C081/5
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of DAC121C08XEB/NOPB

• Number Of Dac's: 1
• Number Of Bits: 12
• Outputs And Type: 1, Single Ended
• Data Interface: Serial
• Settling Time: 6µs
• Dac Type: Voltage
• Voltage Supply Source: Single
• Operating Temperature: -40°C ~ 125°C
• Utilized Ic / Part: DAC121C081/5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: DAC121C08XEB

5.0 Software Operation and Settings
The WaveVision4 software is included with the
WaveVision4 board and the latest version can be
downloaded
http://www.national.com/adc.
software version 4.4 or later is required to evaluate
this device with the WV4 system.
To install this software, follow the procedure in the
WaveVision4 Board User's Guide.
software is installed, run it and set it up as follows:
Note:
WaveVision Hardware is setup according to
Section 3.2.
1. From the WaveVision main menu, go to
2. Under board type, select WaveVision4 (USB).
3. Turn on the power to both boards, then click
4. Click on the "Close" button to close the
5. Navigate to the DAC121C08XEB Evaluation
6. Configure the I
Settings, then Capture Settings to open the
System Settings dialog.
on the "Reset" button and await the firmware
download.
downloaded, WaveVision will open up a
control panel window for the DAC121C08XEB.
System Settings Dialog.
Board window.
Figure 7. Standard mode, Fast Mode, and
High Speed mode are supported.
Before
Figure 7: I
from
continuing,
After the firmware has
2
C Interface speed as seen in
2
National's
C Speed Select
ensure
web
WaveVision4
Once the
that
site
the
at
8
7. Configure the I
8. Perform register level control of the DAC by
9. To put the DAC into power-down mode, select
DAC121C085 will respond to I
0x0C by default with pins A0 and A1 floating
(no jumpers on JP5). Change the I
address of the DAC by adding jumpers to JP5.
Refer to Table 1 for a detailed description of
the I
Figure 8 must match the address configured
by A0 and A1.
NOTE: Jumper Setting changes to the pin-
configured slave address will not take effect
until the DAC is power-cycled.
writing 16-bit words to the DAC Data Register.
To write the DAC, simply type a 16-bit hex
value into the “Manual DAC Control” field and
press Enter or click the “Write DAC Register”
button. See Figure 9.
a power-down option from the “Power-down
Mode” box and click the “Set Mode” button.
Figure 10: DAC Power-down Control
2
C address settings. The address in
Figure 9: Manual DAC Control
Figure 8: I
http://www.national.com
2
C address of the DAC. The
2
C Address
2
C address
2
C slave