PIC24FJ128GB MICROCHIP [Microchip Technology], PIC24FJ128GB Datasheet - Page 281

• Manufacturer Part Number: PIC24FJ128GB
• Description: 64/80/100-Pin, 16-Bit Flash Microcontrollers with USB On-The-Go (OTG)
• Manufacturer: MICROCHIP [Microchip Technology]

25.5
PIC24FJ256GB110 family devices implement a JTAG
interface, which supports boundary scan device testing
as well as In-Circuit Serial Programming.
25.6
PIC24FJ256GB110 family microcontrollers can be seri-
ally programmed while in the end application circuit.
This is simply done with two lines for clock (PGECx)
and data (PGEDx) and three other lines for power,
ground and the programming voltage. This allows cus-
tomers to manufacture boards with unprogrammed
devices and then program the microcontroller just
before shipping the product. This also allows the most
recent firmware or a custom firmware to be
programmed.
© 2008 Microchip Technology Inc.
JTAG Interface
In-Circuit Serial Programming
PIC24FJ256GB110 FAMILY
Preliminary
25.7
When MPLAB
in-circuit debugging functionality is enabled. This func-
tion allows simple debugging functions when used with
MPLAB IDE. Debugging functionality is controlled
through the PGECx (Emulation/Debug Clock) and
PGEDx (Emulation/Debug Data) pins.
To use the in-circuit debugger function of the device,
the design must implement ICSP connections to
MCLR, V
ignated by the ICS Configuration bits. 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.
In-Circuit Debugger
DD
, V
®
SS
ICD 2 is selected as a debugger, the
and the PGECx/PGEDx pin pair des-
DS39897B-page 279