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25C080 データシート(PDF) 6 Page - Microchip Technology

部品番号 25C080
部品情報  8K/16K 5.0V SPI Bus Serial EEPROM
PDF  12 Pages
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

25C080 データシート(HTML) 6 Page - Microchip Technology

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25C080/160
DS21147F-page 6
Preliminary
© 1996 Microchip Technology Inc.
TABLE 2-2:
WRITE PROTECT FUNCTIONALITY MATRIX
FIGURE 2-1:
WRITE TO STATUS REGISTER AND/OR ARRAY FLOWCHART
WPEN
WP
WEL
Protected Blocks
Unprotected Blocks
Status Register
0
X
0
Protected
Protected
Protected
0
X
1
Protected
Writable
Writable
1
Low
0
Protected
Protected
Protected
1
Low
1
Protected
Writable
Protected
X
High
0
Protected
Protected
Protected
X
High
1
Protected
Writable
Writable
CS Returns High
Continue
WEL = 1?
WEL = 1?
WP is low?
WPEN = 1?
Write
Write to
Status Register
Do not write to
Status Register
Write to the
Unprotected Block
Do not write to
Array
No
No
No
No
Yes
Yes
Yes
Yes
No
Yes
No
Yes
To other
Commands
From other
Commands
Write
to Status
Reg?
to array?



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