Microchip Technology MPLAB ICE, User Manual

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MPLAB
®
ICE User’s Guide
DS51159B-page 134
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2001 Microchip Technology Inc.
• If none of this works, proceed to Section 8.4 Configuring a PC's Parallel
Interface for MPLAB ICE.
Check target clock/power
• If you are using target clock, select emulator clock (Options > Develop-
ment Mode > Clock, uncheck Use Target Board Clock) and see if you
can establish communications. If so, there may be a problem with the
target clock.
• If you are using target power, select emulator power (Options > Devel-
opment Mode > Power, select Processor Power From Emulator) and
see if you can establish communications. If so, there may be a problem
with the target power.
Illegal parallel port selected (Windows NT 4.0)
In Windows NT 4.0, check that the parallel port is set to ECP mode in the
PC's BIOS and that compatibility mode is not selected. In some PC BIOS,
the ECP mode is labeled PS2 or Normal mode. The port should not be set
to SPP or EPP mode. Check your PC's BIOS by powering on the PC,
pressing the key that the display indicates for running setup, and following
the on-screen instructions. Also check that the mplabice driver is running
by looking in Control Panel>Devices and scrolling down to find mplabice.
MPLAB ICE driver not loaded (Windows NT 4.0/Windows 2000)
If you suspect that the MPLAB ICE driver is not being loaded correctly,
check the Event Viewer. In Windows NT 4.0, the Event Viewer is under
Start>Programs>Administrative Tools. In Windows 2000, the Event Viewer
is in the Control Panel. "mplabice" should appear in the Source column in
the Event Viewer's System Log. Double-click on the mplabice line to view
the event properties. It should indicate that the MPLAB ICE driver was
loaded successfully. If there is no "mplabice" entry in the Event Viewer's
System Log, the driver is not being loaded.
Program Memory appears correct, but the file registers and program
execution do not appear to work correctly.
• Make sure that the processor clock is set to a valid speed. Select
Options>Processor Setup>Clock Frequency to bring up the Processor
Clock dialog. Verify that the frequency is within the correct range for the
emulated device at the current operating voltage.
• Verify that the correct power source is selected by selecting
Options>Processor Setup>Hardware and verifying the Processor
Power option. If using a target board for a power source, verify that the
target board power has been applied.
On reset, an error message appears saying that there was an error
resetting the processor and to check power.
If you are doing low voltage emulation, this message is the point after
doing a System Reset where the target board should be connected and
voltage applied. However, MPLAB and MPLAB ICE do not always syn-