W49F020-70 Winbond, W49F020-70 Datasheet - Page 7

• Manufacturer Part Number: W49F020-70
• Description: 256K X 8 CMOS FLASH MEMORY
• Manufacturer: Winbond

Command Codes for Chip Erase
Chip Erase Acquisition Flow
Notes for chip erase:
Data Format: DQ7 DQ0 (Hex)
Address Format: A14 A0 (Hex)
BYTE SEQUENCE
1 Write
2 Write
3 Write
4 Write
5 Write
6 Write
address 2AAA
Load data AA
address 2AAA
address 5555
Load data AA
Load data 10
address 5555
Pause 1 Sec.
address 5555
address 5555
Load data 55
ADDRESS
Load data 55
Load data 80
2AAAH
2AAAH
5555H
5555H
5555H
5555H
Exit
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Preliminary W49F020
Publication Release Date: October 1999
DATA
AAH
AAH
55H
80H
55H
10H
Revision A1