PIC16F720-ESLASHML datasheet(164/244 Pages) MICROCHIP

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PIC16F/LF720/721

DS41430A-page 164

 2010 Microchip Technology Inc.

Since data is being written to buffer registers, the

writing of the first 31 words of the block appears to

occur immediately. The processor will halt internal

operations for the typical 4ms, only during the cycle in

which the erase takes place (i.e., the last word of the

32-word block erase). This is not Sleep mode as the

clocks and peripherals will continue to run. After the 32-

word write cycle, the processor will resume operation

with the third instruction after the PMCON1 write

instruction.

FIGURE 18-2:

BLOCK OF 32 WRITES TO FLASH PROGRAM MEMORY

An example of the complete 32-word write sequence is

shown in Example 18-2. The initial address is loaded

into the PMADRH:PMADRL register pair; the 32 words

of data are loaded using indirect addressing.

Program Memory

Buffer Register

PMADRL<4:0> = 00000

Buffer Register

PMADRL<4:0> = 00001

Buffer Register

PMADRL<4:0> = 00010

Buffer Register

PMADRL<4:0> = 11111

PMDATL

PMDATH

PIC16F720-E/ML bảng dữ liệu(PDF) 164 Page - Microchip Technology