19-5529; Rev 1; 1/11
MAX1441 Evaluation System
General Description
The MAX1441 evaluation system (EV system) provides
a proven design to evaluate the MAX1441 capaci-
tive proximity and touch sensor. The EV system con-
sists of two PCBs. The MAX1441 evaluation kit (EV
kit) includes the typical application circuit and all
electronics for USB-to-JTAG communication between
the on-board device and the PC. The MAX1441TP
evaluation kit (TP EV kit) includes two touch pads.
The TP EV kit connects to the EV kit through 20-pin
right-angle connectors. The EV kit board connects to
either the factory-provided kit touch pads board, or
a custom user-supplied touch sensor. The EV sys-
tem also includes Windows XP
M
- or Windows Vista
M
-
compatible integrated development environment
(MAX-IDE) for the MAXQ
M
microcontroller core of the
device.
The EV kit comes with a MAX1441GUP/V+ installed.
S
Wide 6V to 28V VBAT Supply Range
S
External Touch-Sense Pad Included
S
Adaptive Firmware Source Code Included
S
USB PC-to-JTAG Connection
S
USB Powered or Battery Powered
S
Compatible with the MAX-IDE Development Tool
S
Proven PCB Layout
S
Fully Assembled and Tested
Features
Evaluates: MAX1441
Ordering Information
PART
TYPE
MAX1441EVSYS+
EV System
+Denotes
lead(Pb)-free and RoHS compliant.
Component Lists
MAX1441 EV System
QTY
1
1
DESCRIPTION
MAX1441 EV Kit
MAX1441TP EV Kit
Component Lists continued at end of data sheet.
Windows, Windows XP, and Windows Vista are registered
trademarks of Microsoft Corp.
MAXQ is a registered trademark of Maxim Integrated
Products, Inc.
_______________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX1441 Evaluation System
Evaluates: MAX1441
Quick Start
•
MAX1441 EV kit
sion and does not result in LEDOUT2 turning on
(i.e., the device has adapted to its environment).
4) Move your hand away from PAD2 and then back.
LEDOUT2 turns on again. Within the time you moved
your hand away from and then back to PAD2, the
device readjusted its Wake-up Threshold register
again, and your approaching hand causes a wake-up.
Note:
The device is
programmed
to respond only to a
capacitance
increase
at its input terminals (in this case,
caused by your hand moving towards the touch pads).
The output LEDs
do not
remain on, or turn on again, if
your hand is steady at a fixed distance from the touch
pads. Users can implement a different turn-on/turn-off
logic more suitable for their applications.
Required Equipment
•
6V to 28V DC power supply (9V battery) or PC with an
available USB port
The EV kit is shipped from the factory configured
(through jumper settings) for battery operation. To oper-
ate the EV kit from a USB port, see the
Configuring the
EV Kit for USB Interface
section for jumper setting.
The device’s on-board ASIC is preloaded with firmware
that causes the on-board output LEDs (LEDOUT1 and
LEDOUT2) to turn on when capacitance applied on the
input terminals is increased (e.g., by moving your hand
close to the touch pads).
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation:
Procedure
•
•
Programming and Operating
Through the USB Interface
MAX1441 EV kit (USB cable included)
Required Equipment
1) Verify that jumper settings are consistent with the
default positions shown in Tables 1 and 2.
2) Apply a 6V to 28V power supply (or 9V battery) on
the EXT_VBAT and GND terminals on the board.
Channel-1 (PAD1) Nonadaptive to Environment
1) Slowly move your hand towards PAD1. LEDOUT1
turns on when your hand is about 1cm from the PAD1
touch pad.
2) Move your hand away from the touch pad. LEDOUT1
immediately turns off.
3) Move your hand away from PAD1 and then back.
LEDOUT1 turns on again.
Channel-2 (PAD2) Adaptive to Environment
1) Slowly move your hand towards PAD2. LEDOUT2
turns on when your hand is about 2cm from the PAD2
touch pad.
2) Move your hand away from the touch pad. LEDOUT2
immediately turns off.
3) Move your hand close to PAD2 again. Stop and keep
your hand stable when LEDOUT2 turns on. LEDOUT2
stays on for a few seconds and then turns off. During
this time, the device has monitored the capacitance
changes on its input terminal and adjusted its Wake-
Up Threshold register, AT2H. At the end of this
period, the value in the AT2H register is the same
level as a new capacitance-to-digital (C2D) conver-
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 under-
lined
refers to items from the Windows operating system.
Note:
Complete installation of the USB driver before
proceeding with installation of the MAX-IDE application.
Note:
For programming and debugging of the device,
a change from battery-operated demo mode to USB-
powered mode is required. The USB port powers on the
evaluation board only after the USB driver is installed.
Therefore, all LEDs on the board remain off and there is
no response to the touch pads until the USB driver instal-
lation is complete and successful.
1) Visit
www.maxim-ic.com/evkitsoftware
to down-
load the latest version of the EV kit software, 1441Rxx.
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
computer 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
Installing the USB Driver
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MAX1441 Evaluation System
Evaluates: MAX1441
is from an unknown publisher. 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) Set up the evaluation board for communicating
through the USB port. See the
Configuring the EV Kit
for USB Interface
section for jumper setting.
4) Connect the USB cable from the PC to the EV kit
board. A Windows message appears when con-
necting the EV kit board to the PC for the first time.
Each version of Windows has a slightly different mes-
sage. 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.
5) Open the device manager by opening the shortcut
icon in the Windows
Start | Programs | Maxim
EVKIT Software | MAX1441 | Open Device Manager
menu. Identify the COM number under the
Ports
(COM&LPT)
category for the just-installed USB
driver. Write down the COM number for later action
when installing and configuring the MAX-IDE.
6) At this point, the evaluation board should be
powered up, LED0 and LED120 should be lit, and
the on-board CPU should be executing the prepro-
grammed firmware.
7) Move your hand close to the PAD1 and PAD2
touch pads on the evaluation board. LEDOUT1 and
LEDOUT2, corresponding to the PAD1 and PAD2
touch pads, respectively, blink.
Normally this installation is launched automatically by
the EV kit software installer. Use this procedure in case
the MAX-IDE setup was cancelled or MAX-IDE was unin-
stalled.
1) Set up the evaluation board for communicating
through the USB port. See the
Configuring the EV Kit
for USB Interface
section for jumper setting.
2) Run
SETUP.exe
in the
C:\Program Files\Maxim\
MAX1441\MAX-IDE\install
folder to install MAX-IDE
application to your hard drive.
3) In the InstallShield dialogs that appear, select the
Typical
installation, which installs all the necessary
files for application development for the device.
Throughout the installation process, accept the
defaults offered by the installation procedure.
4) Copy the device configuration file,
MAX1441.cfg
from the
C:\Program Files\Maxim\MAX1441\MAX-
IDE\Devices\MAXQ
folder to the
C:\Program Files\
MAX-IDE\Devices\MAXQ
folder.
The MAX-IDE installation is now complete.
1) Set up the EV kit for communicating through the USB
port. See the
Configuring the EV Kit for USB Interface
section for jumper settings.
2) Launch MAX-IDE from the
Start | All Programs
menu or run
GenericIDE.exe
directly from the
C:\Program Files\MAX-IDE
directory (see Figure 1).
3) Select the
MAXQ JTAG
menu item (default) under
Device
in the menu bar (if not already selected).
4) Select the
Options
menu item under
Device
in the
menu bar (see Figure 2).
a) Select the serial port corresponding to the
device’s USB driver (previously described in
Step 5 of the
Installing the USB Driver
section).
b) Type
MAX1441.cfg
in the
Device Configuration
File
edit box.
c) Type
75
in the
Desired JTAG Clock Freq. (kHz)
edit box.
d) Press the
OK
button. The MAX-IDE opens the
specified COM port and establishes communica-
tion at the specified frequency (75kHz). MAX-IDE
is now configured for the EV kit application.
5) Click on
Open Project
in the
Project
tab and open
C:\Program Files\MAX1441\example\appcode\
appcode.prj.
6) Select the
Message
tab at the bottom to view status
messages on the
MAX-IDE
window.
7) Select the
Make
menu item under
Debug
in the
menu bar to assemble the code.
Build Successful
appears in the
Message
window.
8) Select the
Step Into
menu item under
Debug
in the
menu bar.
a) The hex code generated in the previous step
is downloaded into the program memory of the
device, and progress status is displayed in the
MAX-IDE
Message
window. Loading the firm-
ware into the program memory is complete and
successful when
Delay Complete
is displayed.
Opening and Working with
an Existing MAX-IDE Project File
Installing the MAX-IDE Application
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MAX1441 Evaluation System
Evaluates: MAX1441
9) Select
Debug | Run
to start the execution of the firm-
ware just loaded into the device.
The device starts executing the firmware. Move your
hand towards the touch pads to see the device’s
response indicated by turning on/off LEDOUT1 and
LEDOUT2, corresponding to touch pads PAD1 and
PAD2, respectively. Select
Debug | Pause
to stop
the execution and view the content of each register
(displayed on the right side) in the
Register
window.
Select
Debug | Run
to resume execution.
Figure 1. MAX-IDE Main Window
Figure 2. MAX-IDE Device Options Window
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MAX1441 Evaluation System
Evaluates: MAX1441
Figure 3. MAX-IDE Example Project Appcode
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