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M28256 Datasheet(PDF) 14 Page - STMicroelectronics

Part # M28256
Description  256 Kbit 32Kb x8 Parallel EEPROM with Software Data Protection
PDF  21 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M28256 Datasheet(HTML) 14 Page - STMicroelectronics

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AI01704
A0-A5
E
G
DQ0-DQ7
W
tWLWH
tDVWH
Byte 0
tWHWL
A6-A14
tWLAX
tWHWH
tWHDX
tAVEL
5555h
2AAAh
5555h
Byte 62
Byte 63
AAh
55h
A0h
Byte Address
Page Address
Figure 13. Software Protected Write Cycle Waveforms
Note: A6 through A14 must specify the same page address during each high to low transition of W (or E) after the software code has been
entered. G must be high only when W and E are both low.
AI01705
A0-A14
E
G
DQ7
W
DQ7
DQ7
DQ7
DQ7
DQ7
READY
LAST WRITE
INTERNAL WRITE SEQUENCE
Address of the last byte of the Page Write instruction
Figure 14. Data Polling Waveform Sequence
14/21
M28256



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