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dsPICDEM? MCSM
DEVELOPMENT BOARD
USER ’S GUIDE
Chapter 4. Troubleshooting
This chapter provides information for troubleshooting problems encountered while
using the dsPICDEM MCSM Development Board.
4.1
COMMON PROBLEMS
1. Problem: USB connection in DMCI fail (amber and green LEDs are ON)
This condition is accompanied by the following error message:
FIGURE 4-1:
DMCI CONNECTION FAILURE
Solution:
a) Disconnect the USB cable. When disconnected, the green LED turns OFF.
b) Reconnect the USB cable. When reconnected, the amber LED turns OFF,
and the green LED turns ON.
2. Problem: Switching noise
While using a stepper motor, inductances are being switched on and off
frequently. Switching noise is present and can be seen with an oscilloscope.
Solution: To properly measure a signal, connect a probe to the desired signal
and one to ground and perform a division. The signal that results is what the
dsPIC DSC sees.
? 2009 Microchip Technology Inc.
DS70610A-page 29
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