W49F020 Datasheet, PDF (17/21 Pages) Winbond – 256K X 8 CMOS FLASH MEMORY

Preliminary W49F020
Timing Waveforms, continued
Chip Erase Timing Diagram
Address A17-0
DQ7-0
CE
OE
WE
5555
Six-byte code for 5V-only software
chip erase
2AAA
5555
5555
2AAA 5555
XXAA
XX55
XX80
XXAA
XX55
XX10
TWP
TWPH
SB0
SB1
SB2
SB3
SB4
TEC
SB5 ^{Internal Erase starts}
- 17 -
Publication Release Date: October 1999
Revision A1