W49F002U-70B WINBOND [Winbond], W49F002U-70B Datasheet - Page 19

• Manufacturer Part Number: W49F002U-70B
• Description: 256K X 8 CMOS FLASH MEMORY
• Manufacturer: WINBOND [Winbond]

Timing Waveforms, continued
Chip Erase Timing Diagram
Sector Erase Timing Diagram
Address A17-0
Address A17-0
DQ7-0
DQ7-0
WE
WE
CE
OE
CE
OE
SA = Sector Address
5555
5555
T
SB0
T
SB0
WP
WP
AA
AA
T
T
WPH
WPH
2AAA
2AAA
SB1
SB1
Six-byte code for 5V-only software
Six-byte code for 5V-only software
55
55
Main Memory Erase
5555
5555
SB2
SB2
80
80
chip erase
- 19 -
5555
5555
SB3
SB3
AA
AA
2AAA
SB4
2AAA
SB4
55
55
5555
Publication Release Date: April 2000
SA
SB5
SB5
10
30
Internal Erase starts
Internal Erase starts
T
T
EC
EC
W49F002U
Revision A2