Datasheet > PIC12F1572

PIC12F1572

更新时间： 2024-09-30 01:09:47

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HIGH-VOLTAGE ICSP PROGRAMMING

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PIC12F1572 数据手册

PIC12(L)F1571/2

PIC12(L)F1571/2 Memory Programming Specification

1.1.2

LOW-VOLTAGE ICSP

PROGRAMMING

This document includes the

programming specifications for the

following devices:

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.

• PIC12F1571 • PIC12LF1571

• PIC12F1572 • PIC12LF1572

1.0

OVERVIEW

1.1.2.1

Single-Supply ICSP Programming

The device can be programmed using either the high-

voltage In-Circuit Serial Programming™ (ICSP™)

method or the low-voltage ICSP method.

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.

1.1

Hardware Requirements

1.1.1

HIGH-VOLTAGE ICSP

PROGRAMMING

In High-Voltage ICSP mode, the device requires two

programmable power supplies: one for VDD and one for

the MCLR/VPP pin.

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.

1.2

Pin Utilization

Five pins are needed for ICSP programming. The pins

are listed in Table 1-1.

TABLE 1-1:

Pin Name

PIN DESCRIPTIONS DURING PROGRAMMING FOR PIC12(L)F1571/2

During Programming

Function

Pin Type

Pin Description

ICSPCLK

ICSPDAT

ICSPCLK

ICSPDAT

Clock Input – Schmitt Trigger Input

I/O

Data Input/Output – Schmitt Trigger Input

MCLR/VPP

VDD

Program/Verify mode

P⁽¹⁾

Program Mode Select/Programming Power Supply

VDD

VSS

Power Supply

Ground

VSS

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

Note 1: The programming high voltage is internally generated. To activate the Program/Verify mode, high voltage

needs to be applied to MCLR input. Since the MCLR is used for a level source, MCLR does not draw any

significant current.

 2013 Microchip Technology Inc.

DS40001713A-page 1

12 3 4 5 6 7...32

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