DM183026-2 Microchip Technology, DM183026-2 Datasheet - Page 41

• Manufacturer Part Number: DM183026-2
• Description: KIT EVAL MTOUCH CAPACTIVIE
• Manufacturer: Microchip Technology
• Series: mTouch™r

Specifications of DM183026-2

• Sensor Type: Touch, Capacitive
• Sensing Range: 8 & 12 Buttons/Keys, 2 Sliders
• Interface: I²C
• Voltage - Supply: 5V, USB
• Embedded: Yes
• Utilized Ic / Part: PIC16F, PIC18F, PIC24F, PIC32MX
• Interface Type: USB, I2C, UART
• Operating Voltage: 5 V
• Data Bus Width: 32 bit
• Silicon Manufacturer: Microchip
• Kit Application Type: Sensing - Touch / Proximity
• Application Sub Type: Capacitive Touch
• Kit Contents: 8x Brds, Serial Anaylizer, USB Cable
• For Use With/related Products: PIC16F, PIC24F, PIC18F, PIC32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensitivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5.1
© 2010 Microchip Technology Inc.
COMMON ISSUES
This chapter discusses common operational issues and methods to resolve them.
1. The evaluation board does not respond to inputs (i.e., no lights when a key
2. The touch sensors are abnormally sensitive or insensitive (generally
3. The evaluation board and the mTouch Sensing Solution Diagnostic Tool
4. The board’s edge connector will add some additional parasitic capacitance
5. Touching the solder connections can create a very strong coupling to the
plug-in or touch sensor is touched)
Check the evaluation board for power:
• Verify that USB power (V
• If the evaluation board is connected to a computer through a USB hub, verify
• If the evaluation board is directly connected to a computer, verify that the USB
insensitive) to inputs
Check to make sure that the plug-in daughter boards are connected to the
channels that are mentioned in the Readme.txt file.
Check the bar graph settings for the sensors in the mTouch Sensing Solution
software. The evaluation board’s trip point and other settings may have been
changed to values that interfere with the default operation. To correct:
• In the Settings dialog, verify that the Use Firmware Settings option is
• If the Use Saved Value option is selected instead, change the trip point
are installed and operating properly, but are not communicating with each
other
The USB host controller may not have enumerated the evaluation board correctly
upon connection. To correct, try the following:
• If the evaluation board is connected through an external USB hub, try
• Disconnect the board, wait for 5 to 10 seconds, then reconnect the board.
It is also possible that the USB host controller has dropped the communication
channel. This happens occasionally when the evaluation board is placed into
Standby mode and then powered up using the power control. In this case, dis-
connect the evaluation board and reconnect after 5 to 10 seconds.
to the system.
sensor and trigger buttons.
the hub is powered and capable of providing power to downstream devices.
port used is active; try switching to another port.
selected.
values for each affected channel to a value that produces an appropriate
response.
connecting it directly to a USB port on the host computer.
Chapter 5. Troubleshooting
mTouch™ ADVANCED CAPACITIVE
EVALUATION KITS USER’S GUIDE
USB
, +5 V
DC
) is present on the USB connection.
DS41385C-page 41