W49V002A Datasheet, PDF (10/32 Pages) Winbond – 256K x 8 CMOS FLASH MEMORY WITH LPC INTERFACE

Preliminary W49V002A
Command Codes for Sector Erase
BYTE SEQUENCE
1 Write
2 Write
3 Write
4 Write
5 Write
6 Write
ADDRESS
5555H
2AAAH
5555H
5555H
2AAAH
SA*
Sector Erase Acquisition Flow
Load data AA
to
address 5555
Load data 55
to
address 2AAA
Load data 80
to
address 5555
Load data AA
to
address 5555
Load data 55
to
address 2AAA
Load data 30
to
address SA*
Pause T_EC
Exit
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 = 2XXXXh for Main Memory Block2
SA = 38000h to 39FFFh for Parameter Block2 SA = 1XXXXh for Main Memory Block3
SA = 30000h to 37FFFh for Main Memory Block1 SA = 0XXXXh for Main Memory Block4
- 10 -
DATA
AAH
55H
80H
AAH
55H
30H