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PIC16F1459_12

PIC16(L)F145X Memory Programming Specification

Microchip Technology 

PIC16(L)F145X

PIC16(L)F145X Memory Programming Specification

This document includes the

programming specifications for the

following devices:

• PIC16F1454

• PIC16F1455

• PIC16F1459

• PIC16LF1454

• PIC16LF1455

• PIC16LF1459

1.0 OVERVIEW

The devices can be programmed using either the high-

voltage In-Circuit Serial Programming™ (ICSP™)

method or the low-voltage ICSP™ method.

When using low-voltage ICSP™ programming

(LVP = 1), the ICSPDAT/ICSPCLK functions are

additionally enabled on the RA0/RA1 port pins. This

legacy programming feature provides compatibility

support for existing PIC18F1XK50 designs. For new

designs, using the ICSPDAT/ICSPCLK functions on

the RC0/RC1 port pins is recommended.

For Legacy Programming Support, refer to

Section 4.2.1 “Legacy ICSP Pinout Programming”.

1.1 Hardware Requirements

1.1.1

HIGH-VOLTAGE ICSP

PROGRAMMING

In High-Voltage ICSP™ mode, these devices require

two programmable power supplies: one for VDD and

one for the MCLR/VPP pin.

1.1.2

LOW-VOLTAGE ICSP

PROGRAMMING

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

programmed using a single VDD source in the

operating range. The MCLR/VPP pin does not have to

be brought to a different voltage, but can instead be left

at the normal operating voltage.

1.1.2.1 Single-Supply ICSP Programming

The LVP bit in Configuration Word 2 enables single-

supply (low-voltage) ICSP programming. The LVP bit

defaults to a ‘1’ (enabled) from the factory. The LVP bit

may only be programmed to ‘0’ by entering the High-

Voltage ICSP mode, where the MCLR/VPP pin is raised

to VIHH. Once the LVP bit is programmed to a ‘0’, only

the High-Voltage ICSP mode is available and only the

High-Voltage ICSP mode can be used to program the

device.

Note 1: The High-Voltage ICSP mode is always

available, regardless of the state of the

LVP bit, by applying VIHH to the MCLR/

VPP pin.

2: While in Low-Voltage ICSP mode, MCLR

is always enabled, regardless of the

MCLRE bit, and the port pin can no

longer be used as a general purpose

input.

 2011-2012 Microchip Technology Inc.

Advance Information

DS41620C-page 1

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