EVAL-AD7280AEDZ Analog Devices Inc, EVAL-AD7280AEDZ Datasheet - Page 8

• Manufacturer Part Number: EVAL-AD7280AEDZ
• Description: EVALUATION BOARD
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD7280AEDZ

• Silicon Core Number: AD7280A
• Kit Application Type: Power Management - Battery
• Application Sub Type: Battery Monitor
• Kit Contents: Board
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

UG-252
SOFTWARE OPERATION
With the hardware set up, you can now use the software to
control the EVAL-CED1Z and the AD7280A evaluation board.
To launch the software, from the Analog Devices menu, click
the AD7280A submenu, then click on the AD7280A icon.
Figure 3 displays the main window. If an error message appears,
click OK and restart the application after checking the con-
nection between the adapter board and the USB port on the
PC. Also, check that the USB device is identified by the Device
Manager as detailed in the Installing the Software section.
The software that controls the EVAL-CED1Z and, therefore,
the AD7280A evaluation board has one main window. Figure 3
shows the window that appears when the software runs. The
main function of this window is to allow you to read samples
from the evaluation board and display them. The screen can be
divided into three main sections as follows:
•
•
•
USING THE SOFTWARE
Menu Bar
The menu bar consists of the following menus:
Save (Conversion Data). Saves the conversion data to a
spreadsheet file.
Print Front Panel Picture. Prints the software screen displayed.
Save as Picture. Saves the displayed screen plot, that is, voltage
or VT waveforms.
Exit. Closes the AD7280A evaluation software.
Control Buttons
The
buttons on the front panel:
Single AD7280A Eval Board/2 AD7280A Eval Boards.
This drop-down menu selects whether the EVAL-CED1Z
interfaces to a single AD7280A evaluation board or to two
daisy-chained AD7280A evaluation boards.
Initialize. Resends the AD7280A FPGA code to the EVAL-
CED1Z and writes to all the AD7280A devices in the chain to
set up their device addresses correctly.
Real Time. Initiates continuous conversions on the AD7280A
evaluation board. The default conversion loop interval is 2 ms and
can be changed by accessing the Configure AD7280A button.
Read/Write Registers. Allows the user to read from and write
to the registers on both AD7280As on the evaluation board.
Figure 4 shows the window that appears when this button is
pressed.
Configure AD7280A. Allows the user to configure the number
of voltage and temperature channels converted and read back
on each AD7280A on the evaluation board; also allows the
AD7280A
Menu bar
Control buttons
Data capture display
software includes the following user-controlled
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user to set up averaging and acquisition time, specify the SCLK
frequency, and set the conversion loop interval. Figure 5 shows
the window that appears when this button is pressed.
Software Reset. Executes a software reset on all AD7280As on
the evaluation board.
Software PD. Places all AD7280A devices into software power-
down mode.
Self Test. Allows the user to execute the self-test functionality
on any
Hardware PD. Places all AD7280A devices into hardware
power-down mode. This button must be pressed again in order
to power up the devices again.
STOP. Closes the AD7280A evaluation software.
Other items are also included on the front panel, such as the
CED Buffer indicator. The AD7280A evaluation board allows
conversions on all or selected channels to be initiated at
periodic intervals. The default conversion loop interval is 2 ms,
but can be increased to 5 ms, 10 ms, or 30 ms through the
Configure AD7280A button.
The AD7280A evaluation software and hardware are designed
such that all conversion results are written to external memory
on the EVAL-CED1Z, and blocks of samples are then uploaded
through the USB port to the PC. The CED buffer indicator
provides an indication of the available memory remaining. If
there is a lot of activity on the USB port, the transfer of data
may be slowed down, which may cause the external memory to
fill before the data can be uploaded to the PC. In this case, the
CED buffer indicator shows that the buffer is full. The user
should either disconnect other external devices which may be
using the USB port, or increase the conversion loop interval to
decrease the number of samples to upload to ease the
requirement on the USB port. Note that the transfer of data
from the EVAL-CED1Z to the PC is slower when connecting to
a USB 1.1 port then it is when connecting to a USB 2.0 port.
Underneath the CED buffer indicator there are two CRC
indicators. The numeric displays the number of CRC errors that
have occurred to date for the particular data capure. The light
flashes each instant that a CRC error occurs.
Data Capture Display
In the data capture display, the user can select the format
to view the cell voltage or cell temperature conversion results.
For both cell voltage and temperature conversions, the data
can be displayed either in digital output code format or as an
equivalent voltage.
The desired display options are selected by clicking the
Voltage(Codes), Voltage(Volts), VT output(Codes), and VT
output (Volts) tab buttons. If a second EVAL-AD7280AEDZ
evaluation board is connected, there is a seperate set of tabs for
the results from this board.
AD7280A
device on the board.
Evaluation Board User Guide