Microchip Technology MPLAB ICE, User Manual

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2001 Microchip Technology Inc. DS51159B-page 133
MPLAB
®
ICE USER’S GUIDE
12
Chapter 8. Troubleshooting
8.1 Introduction
This section describes some common problems associated with running
MPLAB ICE and steps to follow to resolve those problems.
8.2 Highlights
This section discusses the following:
• Common Problems
- Communications cannot be established with MPLAB ICE
- Illegal parallel port selected (Windows NT 4.0)
- MPLAB ICE driver not loaded (Windows NT 4.0/Windows 2000)
- Program Memory appears correct, but the file registers and pro-
gram execution do not appear to work correctly
- On reset, an error message appears saying that there was an
error resetting the processor and to check power
- Power light is blinking
• Configuring a PC's Parallel Interface for MPLAB ICE
8.3 Common Problems
Communications cannot be established with MPLAB ICE
Check the LPT Port
• Verify that MPLAB ICE is connected to the selected LPT port.
• Select Options > Development Mode and select the Ports tab. Click
Query Port Info to see what LPT (parallel) ports are available.
• Verify that the LPT port and MPLAB software are using the same
communication protocol. Check the LPT port setting through the PC’s
BIOS. If using an add-in card, verify the card’s jumpers. For optimum
performance, set your LPT port to a bi-directional mode (e.g., PS/2,
EPP, or ECP). MPLAB will use bi-directional communications if it thinks
the port can support it.
• If your parallel port does not support a bi-directional mode, try forcing
MPLAB to use compatibility mode by selecting and checking the Force
Compatibility Mode checkbox.
• In Windows 2000, the operating system might report a different address
for the LPT port for MPLAB ICE than MPLAB does. If this occurs, you
must change this setting in the operating system under Control Panel >
System > Device Manager. Click the + to see the port, and double-click
on it or select it and click Properties to set the address in NT.