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DS21126B-page 3-10

© 1996 Microchip Technology Inc.

FIGURE 7-1:

CACHE WRITE TO THE ARRAY STARTING AT A PAGE BOUNDARY

FIGURE 7-2:

CACHE WRITE TO THE ARRAY STARTING AT A NON-PAGE BOUNDARY

1

Write command initiated at byte 0 of page 3 in the array;

First data byte is loaded into the cache byte 0.

2 64 bytes of data are loaded into cache.

cache page 0

cache

byte 0

cache

byte 1

• • •

cache

byte 7

cache page 1

bytes 8-15

cache page 2

bytes 16-23

• • •

cache page 7

bytes 56-63

4

Remaining pages in cache are written

to sequential pages in array.

page 0 page 1 page 2 byte 0 byte 1

• • • byte 7 page 4 • • •

page 0 page 1 page 2

page 3

page 4

• • •

page 7

page 7

array row n

array row n + 1

3

Write from cache into array initiated by STOP bit.

Page 0 of cache written to page 3 of array.

Write cycle is executed after every page is written.

5 Last page in cache written to page 2 in next row.

1

Write command initiated; 64 bytes of data

loaded into cache starting at byte 2 of page 0.

cache

byte 0

cache

byte 1

• • •

cache

byte 7

cache page 1

bytes 8-15

cache page 2

bytes 16-23

• • •

cache page 7

bytes 56-63

page 0 page 1 page 2 byte 0 byte 1

page 4

• • •

page 0 page 1 page 2

page 3

page 4

• • •

page 7

page 7

4

Write from cache into array initiated by STOP bit.

Page 0 of cache written to page 3 of array.

Write cycle is executed after every page is written.

6 Last 3 pages in cache written to next row in array.

cache

byte 2

2

Last 2 bytes ‘roll ever’

to beginning.

3

5

Remaining bytes in cache

are written sequentially to

array.

Last 2 bytes

loaded into

page 0 of cache.

byte 2 byte 3 byte 4

• • • byte 7

array row n

array row n+1