PIC24HJ16GP304-E Datasheet, PDF (178/274 Pages) Microchip Technology – High-Performance, 16-bit Microcontrollers

PIC24HJ32GP202/204 AND PIC24HJ16GP304
19.7 In-Circuit Serial Programming
PIC24HJ32GP202/204 and PIC24HJ16GP304 family
microcontrollers 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 pro-
gramming allows customers to manufacture boards
with unprogrammed devices and then program the
microcontroller 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) document for details about In-Circuit Serial
Programming™ (ICSP)™.
Any of the following 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 Emulation/Debug Clock (PGECx) and
Emulation/Debug Data (PGEDx) pin functions.
Any of the following three pairs of debugging clock/data
pins can be used:
• PGEC1 and PGED1
• PGEC2 and PGED2
• PGEC3 and PGED3
To make use of the in-circuit debugger function of the
device, the design must implement ICSP connections
to MCLR, VDD, VSS and 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.
DS70289H-page 178
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