Datasheet

dsPIC33FJ16(GP/MC)101/102 AND dsPIC33FJ32(GP/MC)101/102/104
DS70652E-page 266  2011-2012 Microchip Technology Inc.
23.5 In-Circuit Serial Programming™
(ICSP™)
Devices can be serially programmed while in the end
application circuit. This is done with two lines for clock
and data and three other lines for power, ground and
the programming sequence. Serial programming
allows customers to manufacture boards with
unprogrammed devices and then program the Digital
Signal Controller just before shipping the product.
Serial programming also allows the most recent
firmware or a custom firmware to be programmed.
Refer to the “dsPIC33F Flash Programming
Specification for Devices with Volatile Configuration
Bits” (DS70659) for details about In-Circuit Serial
Programming (ICSP).
Any of the three pairs of programming clock/data pins
can be used:
• PGEC1 and PGED1
• PGEC2 and PGED2
• PGEC3 and PGED3
23.6 In-Circuit Debugger
When MPLAB
®
ICD 3 is selected as a debugger, the in-
circuit debugging functionality is enabled. This function
allows simple debugging functions when used with
MPLAB IDE. Debugging functionality is controlled
through the PGECx (Emulation/Debug Clock) and
PGEDx (Emulation/Debug Data) pin functions.
Any of the three pairs of debugging clock/data pins can
be used:
• PGEC1 and PGED1
• PGEC2 and PGED2
• PGEC3 and PGED3
To use the in-circuit debugger function of the device,
the design must implement ICSP connections to
MCLR
, VDD, VSS and the PGECx/PGEDx pin pair. In
addition, when the feature is enabled, some of the
resources are not available for general use. These
resources include the first 80 bytes of data RAM and
two I/O pins.