PIC16F946-ESLASHMLQTP datasheet(241/330 Pages) MICROCHIP

241 / 330 page

DS41250F-page 239

PIC16F913/914/916/917/946

16.9

In-Circuit Debugger

When the debug bit in the Configuration Word register

is programmed to a ‘0’, the In-Circuit Debugger func-

tionality is enabled. This function allows simple debug-

ging functions when used with MPLAB® ICD 2. When

the microcontroller has this feature enabled, some of

the resources are not available for general use. See

Table 16-9 for more detail.

For more information, see “Using MPLAB® ICD 2”

(DS51265), available on Microchip’s web site

(www.microchip.com).

16.9.1

ICD PINOUT

The devices in the PIC16F91X/946 family carry the

circuitry for the In-Circuit Debugger on-chip and on

existing device pins. This eliminates the need for a

separate die or package for the ICD device. The

pinout for the ICD device is the same as the devices

(see Section 1.0 “Device Overview” for complete

pinout and pin descriptions). Table 16-9 shows the

location and function of the ICD related pins on the 28

and 40-pin devices.

TABLE 16-9:

PIC16F91X/946-ICD PIN DESCRIPTIONS

Note: The user’s application must have the

circuitry

required

support

ICD

functionality. Once the ICD circuitry is

enabled, normal device pin functions on

RB6/ICSPCLK/ICDCK/SEG14

and

RB7/ICSPDAT/ICDDAT/SEG13 will not be

usable. The ICD circuitry uses these pins for

communication with the ICD2 external

debugger.

Pin Numbers

Name

Type

Pull-up

Description

PDIP

TQFP

PIC16F914/917 PIC16F913/916

PIC16F946

ICDDATA

TTL

—

In Circuit Debugger Bidirectional data

ICDCLK

—

In Circuit Debugger Bidirectional clock

MCLR/VPP

—

Programming voltage

11,32

10, 19, 38, 51

VDD

P—

Power

12,31

8,19

9, 20, 41, 56

VSS

—

Ground

——

AVDD

—

Analog power

——

AVSS

—

Analog ground

Legend:

TTL = TTL input buffer, ST = Schmitt Trigger input buffer, P = Power, HV = High Voltage

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