PIC16F690 datasheet(3/78 Pages) MICROCHIP

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Debug Header Specification

 2006-2012 Microchip Technology Inc.

DS51292T-page 3

DEBUG DETAILS

Next generation in-circuit emulators (such as the MPLAB® REAL ICE™ in-circuit

emulator) and in-circuit debuggers work with devices that have on-chip debug circuitry.

Sometimes the actual production device will have this circuitry and sometimes a

special version of this device is required or available for code debugging. This special

version of the chip, with the suffix -ICD or -ICE, is mounted on a debug header

(Figure 2).

FIGURE 2:

DEBUG OPTIONS

In general, ICE devices are designed for next-generation in-circuit emulator use and

ICD devices are designed for in-circuit debugger use. However, ICE devices may be

used with an in-circuit debugger and ICD devices may be used with a next-generation

in-circuit emulator, but will provide only basic ICD functionality.

To determine what device resources must be dedicated to debugging for either a

device with on-board debug capability or the special ICE/ICD device, see the

“Resources used by ...” section of the in-circuit emulator or in-circuit debugger online

Help file.

Note:

ICE/ICD devices are only used on the header; they are not sold separately.

Production Device without

On-Board Debug Circuitry

Debug

Circuitry

Production Device with

On-Board Debug Circuitry

Vdd

MCLR/Vpp

Vss

Rx0/CLK

Rx1/DAT

Debug

Circuitry

No debug capability.



Header required for debug.

Debug capability available.



However, header can provide

dedicated resources for debug.

VDD

VPP

VSS

CLK

DAT

Rx0

Rx1

Debug

Memory

MCLR

ICE/ICD Device with On-board Debug

Circuitry, Dedicated Debug Pins and

(sometimes) Dedicated Debug Memory

Debug header with additional



circuitry to support debug



functions.

TP1

TP2

TP3

ICE/

ICD

Device

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