PIC16F datasheet(18/40 Pages) MICROCHIP

18 / 40 page

PIC16F/LF182X/PIC12F/LF1822

DS41390C-page 18

Advance Information

 2010 Microchip Technology Inc.

4.3.9

BEGIN EXTERNALLY TIMED

PROGRAMMING

A Load Configuration, Load Data for Program Memory

or Load Data for Data Memory command must be given

before every Begin Programming command. Program-

ming of the addressed memory will begin after this

command is received. To complete the programming

the End Externally Timed Programming command

must be sent in the specified time window defined by

TPEXT. No internal erase is performed for the data

EEPROM, therefore, the device should be erased prior

to executing this command.

The Begin Externally Timed Programming command

cannot be used for programming the Configuration

Words (see Figure 4-9).

FIGURE 4-9:

BEGIN EXTERNALLY TIMED PROGRAMMING

4.3.10

END EXTERNALLY TIMED

PROGRAMMING

This command is required after a Begin Externally

Timed

Programming

command

is given.

This

command must be sent within the time window

specified by TPEXT after the Begin Externally Timed

Programming command is sent.

After sending the End Externally Timed Programming

command, an additional delay (TDIS) is required before

sending the next command. This delay is longer than

the delay ordinarily required between other commands

(see Figure 4-10).

FIGURE 4-10:

END EXTERNALLY TIMED PROGRAMMING

ICSPCLK

ICSPDAT

End Externally Timed Programming

Command

TPEXT

ICSPCLK

ICSPDAT

TDIS

Next Command

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