PIC16F1507-ESLASHSS. datasheet(87/278 Pages) MICROCHIP

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DS40001586D-page 87

PIC16(L)F1507

FIGURE 10-6:

FLASH MEMORY WRITE FLOWCHART

Start

Write Operation

End

Write Operation

CPU stalls while Write

operation completes

(2 ms typical)

No delay when writing to

Program Memory Latches

Determine number of

words to be written into

Program or Configuration

Memory. The number of

words cannot exceed the

number of words per row

(word_cnt)

Last word to

write ?

Disable Interrupts

(GIE =

Select

Program or Config.

Memory (CFGS)

Select Row Address

(PMADRH:PMADRL)

Select Write Operation

(FREE =

Load Write Latches Only

(LWLO =

Enable Write/Erase

Operation (WREN =

Load the value to write

(PMDATH:PMDATL)

Update the word counter

(word_cnt--)

Unlock Sequence

(See Note 1)

Increment Address

(PMADRH:PMADRL++)

Write Latches to Flash

(LWLO =

Unlock Sequence

(See Note 1)

Disable Write/Erase

Operation (WREN =

Re-enable Interrupts

(GIE =

Yes

Rev. 10-000049A

7/30/2013

Note 1:

See Figure 10-3.

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