PIC24HJ12GP201_11 Datasheet, PDF (173/262 Pages) Microchip Technology – High-Performance, 16-bit Microcontrollers 5-cycle latency

PIC24HJ12GP201/202
19.7 In-Circuit Serial Programming
PIC24HJ12GP201/202 family digital signal controllers
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
dsPIC30F/33F Flash Programming Specification
(DS70152) 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
19.8 In-Circuit Debugger
When MPLAB^® ICD 2 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.
© 2007-2011 Microchip Technology Inc.
DS70282E-page 173