w49v002a Winbond Electronics Corp America, w49v002a Datasheet - Page 10

• Manufacturer Part Number: w49v002a
• Description: 256k X 8 Cmos Flash Memory With Lpc Interface
• Manufacturer: Winbond Electronics Corp America

Command Codes for Sector Erase
Sector Erase Acquisition Flow
Notes for chip erase:
Data Format: DQ7 DQ0 (Hex)
Address Format: A14 A0 (Hex)
SA : Sector Address
SA = 3C000h to 3FFFFh for Boot Block
SA = 3A000h to 3BFFFh for Parameter Block1
SA = 38000h to 39FFFh for Parameter Block2
SA = 30000h to 37FFFh for Main Memory Block1 SA = 0XXXXh for Main Memory Block4
BYTE SEQUENCE
1 Write
2 Write
3 Write
4 Write
5 Write
6 Write
SA = 2XXXXh for Main Memory Block2
SA = 1XXXXh for Main Memory Block3
Load data AA
address 2AAA
address 2AAA
address 5555
address 5555
Load data AA
Load data 30
address SA*
address 5555
Load data 55
Load data 55
Pause T
Load data 80
ADDRESS
2AAAH
2AAAH
5555H
5555H
5555H
- 10 -
SA*
Exit
to
to
to
to
to
to
EC
Preliminary W49V002A
DATA
AAH
AAH
55H
80H
55H
30H