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MAX8821 Evaluation Kit
? MAX8821 EV kit
Quick Start
Recommended Equipment
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 privi-
leges are required to install the USB device driver
? 2.5V to 5.5V power supply capable of delivering 2A
? Two digital multimeters (DMM1, DMM2)
? Audio source (i.e., CD player, MP3 player, etc.)
? 4 Ω /8 Ω speaker
? A user-supplied Windows 2000/XP/Vista PC with a
spare USB port
? CMAXQUSB+ command module (USB cable included)
Note: In the following sections, software-related items
are identified by bolding. Text in bold refers to items
directly from the MAX8821 EV kit software. Text in bold
and underlined refers to items from the Windows
2000/XP/Vista operating system.
Procedure
The MAX8821 EV kit is a fully assembled and tested
surface-mount board. Follow the Power Up section to
verify board operation and Power Down section to safe-
ly power down the EV kit.
Power Up
Reference Figure 1 and the power-up procedure below
to properly verify the MAX8821 EV kit.
1) Visit www.maxim-ic.com/evkitsoftware to download
the latest version of the EV kit software,
8821Rxx.ZIP. Save the EV kit software to a tempo-
rary folder and uncompress the ZIP file.
2) Install the EV kit software on your computer by run-
ning the INSTALL.EXE program inside the temporary
folder. The program files are copied and icons are
created in the Windows Start | Programs menu.
3) Connect the USB cable from the PC to the EV kit
board. A Building Driver Database window pops
up in addition to a New Hardware Found message
when installing the USB driver for the first time. If
on Windows.
4) 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\MAX8821 (default installation
directory) using the Browse button. During device
driver installation, Windows may show a warning mes-
sage indicating the device driver that 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 document USB_Driver_Help.PDF for
additional information.
5) Preset the power supply to 3.6V. Turn off the power
supply. Do not turn on the power supply until all
connections are complete.
6) On the CMAXQUSB command module, ensure that
the shunt on jumper JU1 is in the 3.3V position.
7) Verify that JU1 (MAX8821 EV kit) is installed.
8) Verify that JU4 and JU5 (MAX8821 EV kit) have
shunts installed across pins 1 and 2.
9) Verify that the center pin of JU6 is connected to
PCB label B.
10) Verify that the center pin of JU7 is connected to
PCB label R.
11) Carefully connect the boards by aligning the 20-pin
connector of the MAX8821 EV kit with the 20-pin
header of the CMAXQUSB interface board. Gently
press them together.
12) Connect the positive lead of the power supply to
VBATT+ and the negative lead to VBATT-.
13) Observe correct speaker polarity. Connect the
speaker across the SPK+ and SPK- test points.
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