Datasheet

MAX44009 Evaluation Kit
Evaluates: MAX44009
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Quick Start
Recommended Equipment
• MAX44009EVkit
• User-supplied Windows XP, Windows Vista, or
Windows 7 PC with a spare USB port
Note: In the following sections, software-related items
are identified by bolding. Text in bold refers to items
directly from the EV Kit software. Text in bold and
underlined refers to items from the Windows operating
system.
Procedure
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation:
1) Visit www.maxim-ic.com/evkitsoftware to download
the latest version of the EV kit software, 44009Rxx.
ZIP. Save the EV kit software to a temporary folder
and uncompress the ZIP file.
2) Install the EV kit software on your computer by
running the INSTALL.EXE program inside the
temporary folder. The program files are copied and
icons are created in the Windows Start | Programs
menu.
3) Verify that a shunt is installed across pins 2-3 on
jumper JU4 (USB powered).
4) Connect the USB cable from the PC to the EV kit
board. A New Hardware Found windows pops
up when installing the USB driver for the first time.
If you do not see a window that is similar to the
one described above after 30s, remove the USB
cable from the board and reconnect it. Administrator
privileges are required to install the USB device driver
on Windows.
5) Follow the directions of the Add New Hardware
wizard to install the USB device driver. Choose
the Search for the best driver for your device
option. Specify the location of the device driver to
be C:\Program Files\MAX44009 (default installation
directory) using the Browse button. During device
driver installation, Windows may show a warning
message indicating that the device driver Maxim uses
does not contain a digital signature. This is not an error
condition and it is safe to proceed with installa-
tion. Refer to the USB_Driver_Help.PDF document
included with the software for additional information.
6) Start the EV kit software by opening its icon in the
Start | Programs menu. The EV kit software main
window appears, as shown in Figure 1. Observe as
the program automatically detects the EV kit and
starts the main program.
7) Monitor and verify the ambient light lux reading of
the EV kit. See the Detailed Description of Software
section to evaluate the features of the EV kit.
Detailed Description of Software
The MAX44009 EV kit software GUI (Figure 1) is a
Windows program that provides a convenient means to
control the MAX44009. The EV kit software accurately
reads the device’s digital output and displays the lux
reading of ambient light. The software has an option
to extend the resolution and dynamic range of lux
measurements. The software also sets the upper and
lower lux threshold limits, configures the interrupt
functionality, and configures other modes of device.
Refer to the Register and Bit Descriptions section in the
MAX44009 IC data sheet for further details.
The Data Log checkbox enables the user to log the lux
readings data.
Simple SMBus Commands
There are two methods for communicating with the
device, through the EV kit software main window (Figure
1), or through the interface window available by select-
ing the Options | Interface (Advanced Users) menu
item from the menu bar. The Maxim command module
interface window (Figure 2) includes a 2-wire interface
tab that allows for execution of the frequently used
commands.