Microchip Technology PICkit 3 Starter Kit DV164130 DV164130 用户手册
产品代码
DV164130
PICkit™ 3 User’s Guide
DS51795A-page 32
© 2009 Microchip Technology Inc.
FIGURE 5-1:
CONNECTING THE DEMO BOARD TO THE PICkit™ 3
5.3.3
Configuration Bits and Debug Express
PIC microcontroller devices that do not require an ICD Header and may be debugged
directly contain a DEBUG bit in the Configuration Word(s) that enables and disables
the debug mode on the PIC microcontroller.
directly contain a DEBUG bit in the Configuration Word(s) that enables and disables
the debug mode on the PIC microcontroller.
This bit is automatically set appropriately by the MPLAB IDE when using PICkit 3
Debug Express and should not be specified in source code configuration settings.
Debug Express and should not be specified in source code configuration settings.
Many 16-bit PIC microcontroller devices such as PIC24 and dsPIC33 families have
multiple ICSP programming and debugging port pins labeled PGC1/EMUC1 and
PGD1/EMUD1, PGC2/EMUC2 and PGD2/EMUD2, etc. While any ICSP port may be
used for programming, only one port is active at a time for debugging. The active EMU
port is set in the device Configuration bits. If the active port setting does not match the
EMU port to which the PICkit 3 is connected, the device will be unable to enter debug
mode. In the MPLAB IDE Configuration Bits dialog, these bits are usually referred to as
the “Comm Channel Select” bits.
multiple ICSP programming and debugging port pins labeled PGC1/EMUC1 and
PGD1/EMUD1, PGC2/EMUC2 and PGD2/EMUD2, etc. While any ICSP port may be
used for programming, only one port is active at a time for debugging. The active EMU
port is set in the device Configuration bits. If the active port setting does not match the
EMU port to which the PICkit 3 is connected, the device will be unable to enter debug
mode. In the MPLAB IDE Configuration Bits dialog, these bits are usually referred to as
the “Comm Channel Select” bits.
CAUTION
The DEBUG configuration bit value should not be specified in source code Configura-
tion settings under normal conditions. Doing so may cause the bit to be asserted when
programming a device outside the debugger. This will cause the device to function
improperly or not all at in the application circuit.
tion settings under normal conditions. Doing so may cause the bit to be asserted when
programming a device outside the debugger. This will cause the device to function
improperly or not all at in the application circuit.