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 2010 Microchip Technology Inc.DS39606E-page 1

PIC18FXX80/XX85

1.0DEVICE OVERVIEW

This document includes the programming

specifications for the following devices:

2.0PROGRAMMING OVERVIEW

PIC18FXX80/XX85 devices can be programmed using

either the high-voltage In-Circuit Serial ProgrammingTM

(ICSPTM) method, or the low-voltage ICSP method.

Both of these programming methods can be done with

the device in the user’s system. The low-voltage ICSP

method is slightly different than the high-voltage

method, and these differences are noted where appli-

cable. This programming specification applies to

PIC18FXX80/XX85 devices in all package types.

2.1Hardware Requirements

2.1.1HIGH-VOLTAGE ICSP

PROGRAMMING

In High-Voltage ICSP mode, these devices require two

programmable power supplies: one for VDDand one for

MCLR/VPP. Both supplies should have a minimum

resolution of 0.25V. Refer to Section 6.0 “AC/DC

Characteristics Timing Requirements for Program/

Verify Test Mode”for additional hardware parameters.

2.1.2LOW-VOLTAGE ICSP

PROGRAMMING

In Low-Voltage ICSP mode, these devices can be pro-

grammed using a VDDsource in the operating range.

This only means that MCLR/VPPdoes not have to be

brought to a different voltage but can instead be left at the

normal operating voltage. Refer to Section6.0 “AC/DC

Characteristics Timing Requirements for Program/

Verify Test Mode” for additional hardware parameters.

2.2Pin Diagrams

The pin diagrams for the PIC18FXX80/XX85 family are

shown in Figure 2-1, Figure 2-2 and Figure 2-3. The

pin descriptions of these diagrams do not represent the

complete functionality of the device types. Users

should refer to the appropriate device data sheet for

complete pin descriptions.

TABLE 2-1:PIN DESCRIPTIONS (DURING PROGRAMMING): PIC18FXX80/XX85

• PIC18F6585• PIC18F6680

• PIC18F8585• PIC18F8680

Pin Name

During Programming

Pin NamePin TypePin Description

MCLR/VPP/RA5 VPP PProgramming Enable

VDD(2) VDD PPower Supply

VSS(2) VSS P Ground

AVDD(2) AVDD PAnalog Power Supply

AVSS(2) AVSS PAnalog Ground

RB5PGMILow-Voltage ICSP™ Input when LVPConfiguration bit equals ‘1’ (1)

RB6PGCISerial Clock

RB7PGDI/OSerial Data

OSC1OSC1IOscillator Input (needs to be pulled high during programming.)

Legend: I = Input, O = Output, P = Power

Note 1:See Section5.3 “Low-Voltage Programming (LVP) Bit”for more detail.

2: All power supplies and ground must be connected.

Flash Microcontroller Programming Specification

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