64GA106 datasheet(255/330 Pages) MICROCHIP

255 / 330 page

 2010 Microchip Technology Inc.

DS39905E-page 255

PIC24FJ256GA110 FAMILY

25.5

JTAG Interface

PIC24FJ256GA110 family devices implement a JTAG

interface, which supports boundary scan device

testing.

25.6

In-Circuit Serial Programming

PIC24FJ256GA110 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

customers 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.

25.7

In-Circuit Debugger

When MPLAB® ICD 2 is selected as a debugger, the

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, VDD, VSS and the PGECx/PGEDx pin pair des-

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.

64GA106 데이터시트(PDF) 255 Page - Microchip Technology