m28256 STMicroelectronics, m28256 Datasheet - Page 14

• Manufacturer Part Number: m28256
• Description: 256 Kbit 32kb X8 Parallel Eeprom With Software Data Protection
• Manufacturer: STMicroelectronics

M28256
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.
Figure 14. Data Polling Waveform Sequence
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G
E
W
A0-A5
A6-A14
DQ0-DQ7
A0-A14
E
G
W
DQ7
LAST WRITE
DQ7
tAVEL
5555h
tDVWH
tWLWH
AAh
Address of the last byte of the Page Write instruction
DQ7
tWLAX
2AAAh
INTERNAL WRITE SEQUENCE
55h
DQ7
5555h
tWHDX
A0h
Byte Address
Page Address
DQ7
Byte 0
tWHWL
Byte 62
READY
DQ7
Byte 63
tWHWH
AI01704
AI01705