Datasheet
_________________________________________________________________ Maxim Integrated Products 3
MAX14820 Evaluation Kit
Evaluates: MAX14820/MAX14821
Quick Start
Recommended Equipment
• MAX14820 EV kit (USB A-to-B cable included)
• User-supplied Windows XP, Windows Vista, or
Windows 7 PC with a spare USB port
• 24V, 100mA DC power supply
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 under-
lined 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 before exercising the full
features of the device:
1) Visit www.maxim-ic.com/evkitsoftware to download
the latest version of the EV kit software, 14820Rxx.ZIP.
Save the EV kit software to a temporary folder and
uncompress the ZIP file.
2) Install the EV kit software and USB driver on your com-
puter by running the INSTALL.EXE program inside
the temporary folder. The program files are copied to
your PC and icons are created in the Windows Start
| Programs menu. During software installation, some
versions of Windows may show a warning message
indicating that this software is from an unknown pub-
lisher. This is not an error condition and it is safe to
proceed with installation. Administrator privileges are
required to install the USB device driver on Windows.
3) Verify that all the jumpers are in their default positions,
as shown in Table 1.
4) Connect the 24V DC power supply on the VCC and
GND connectors on the EV kit board.
5) Connect the USB cable from the PC to the EV kit
board. A Windows message appears when connect-
ing the EV kit board to the PC for the first time. Each
version of Windows has a slightly different message.
If you see a Windows message stating ready to use,
then proceed to the next step. Otherwise, open the
USB_Driver_Help_200.PDF document in the Windows
Start | Programs menu to verify that the USB driver
was installed successfully.
6) Start the EV kit software by opening its icon in the
Windows Start | Programs menu. The EV kit software
main window appears, as shown in Figure 1.
7) Verify that Hardware: Connected is displayed on the
status bar at the bottom of the main window.
8) Press the Read or Write buttons on the GUI to access
the device SPI registers.
Detailed Description of Software
The main window of the evaluation software (Figure 1)
displays the SPI registers and the device pins that are
connected to the on-board MAXQ2000 microcontroller.
The user can send read or write SPI commands to the
device, configure the logic levels of the device input pins,
and read back the logic levels of the device output pins.
To read an SPI register or an output pin logic level, press
the Read button.
To configure an SPI register or an input pin logic level,
first click on the desired radio button(s), and then press
the Write button.
The software also automatically monitors the presence of
the wake-up pulse on the WU pin and displays the result
on the GUI.
The user can also change the SPI clock speed by click-
ing on the desired SPI Clock Speed radio button.
Advanced User Interface
There are two methods for communicating with the
device. The first is through the window shown in Figure
1. The second is through the Advanced User Interface
window shown in Figure 2. The Advanced User Interface
window becomes available by selecting the Options
| Interface (Advanced User) menu item and allows
execution of serial commands manually.
The Advanced User Interface window can also be
used as a debug tool because it is capable of manually
reading and writing to every register and logic pin of the
device.