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S-93C46AMFN 数据表(PDF) 13 Page - Seiko Instruments Inc

部件名 S-93C46AMFN
功能描述  CMOS SERIAL E2PROM
PDF  53 Pages
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制造商  SII [Seiko Instruments Inc]
网页  http://www.sii.co.jp
标志 SII - Seiko Instruments Inc

S-93C46AMFN 数据表(HTML) 13 Page - Seiko Instruments Inc

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CMOS SERIAL E
2PROM
S-93C46A/56A/66A
Seiko Instruments Inc.
12
3.
Write enable (EWEN) and Write disable (EWDS)
The EWEN instruction puts the S-93C46A/56A/66A into write enable mode, which accepts WRITE, ERASE, WRAL,
and ERAL instructions. The EWDS instruction puts the S-93C46A/56A/66A into write disable mode, which refuses WRITE,
ERASE, WRAL, and ERAL instructions.
The S-93C46A/56A/66A powers on in write disable mode, which protects data against unexpected, erroneous write
operations caused by noise and/or CPU malfunctions. It should be kept in write disable mode except when performing write
operations.
Figure 19 EWEN/EWDS Timing (S-93C46A)
4Xs
11=EWEN
00=EWDS
0
8
7
6
5
4
3
2
1
SK
DI
1
0
9
STANDBY
CS
Figure 20 EWEN/EWDS Timing (S-93C56A)
6Xs
11=EWEN
00=EWDS
0
8
7
6
5
4
3
2
1
SK
DI
1
0
11
9
STANDBY
CS
10
Figure 21 EWEN/EWDS Timing (S-93C66A)
6Xs
11=EWEN
00=EWDS
0
8
7
6
5
4
3
2
1
SK
DI
1
0
11
9
STANDBY
CS
10



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