PIC12F617T-I/MS データシートの表示（PDF） - Microchip Technology

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PIC12F617T-I/MS

8-Pin Flash-Based, 8-Bit CMOS Microcontrollers

Microchip Technology 

PIC12F609/615/617/12HV609/615

FIGURE 3-2:

BLOCK WRITES TO 2K FLASH PROGRAM MEMORY

75

07

0

PMDATH

PMDATL

6

8

First word of block

to be written

If at a new row

sixteen words of

Flash are erased,

then four buffers

are transferred

to Flash

automatically

after this word

is written

14

14

14

14

PMADRL<1:0> = 00

PMADRL<1:0> = 01

PMADRL<1:0> = 10

PMADRL<1:0> = 11

Buffer Register

Buffer Register

Buffer Register

Buffer Register

Program Memory

FIGURE 3-3:

FLASH PROGRAM MEMORY LONG WRITE CYCLE EXECUTION

Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1

Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

Flash

ADDR

PC + 1

Flash

DATA

INSTR

(PC)

INSTR ignored

(PC + 1) read

BSF PMCON1,WR INSTR (PC + 1)

Executed here Executed here

Flash

Memory

Location

WR bit

PMWHLT

PMADRH,PMADRL

PC + 2

PC + 3

PC + 4

PMDATH,PMDATL

Processor halted

PM Write Time

INSTR (PC+2) INSTR (PC+3)

(INSTR (PC + 2)

NOP

NOP

INSTR (PC + 3)

Executed here Executed here Executed here

 2010 Microchip Technology Inc.

DS41302D-page 33

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