W49L201 Datasheet, PDF (19/23 Pages) Winbond – 256K X 8 CMOS FLASH MEMORY

W49L201
Timing Waveforms, continued
Boot Block Lockout Enable Timing Diagram
Address A16-0
DQ15-0
CE
OE
WE
5555
Six-word code for Boot Block
Lockout Feature Enable
2AAA
5555
5555
2AAA
5555
XXAA
XX55
XX80
XXAA
XX55
XX40
TWP
TEC
TWPH
SW0
SW1
SW23 SW3
SW4
SW5
*Note: It is not allowed to assert read operation(CE# &OE# are both active) during the
command sequence. If read command is asserted during the command
sequence, then the device will return to read mode(abort write).
Chip Erase Timing Diagram
Address A16-0
DQ15-0
CE
OE
WE
5555
Six-word code for 3.3V-only software
chip erase
2AAA
5555
5555
2AAA 5555
XXAA XX55
XX80 XXAA XX55
XX10
TWP
TWPH
SW0
SW1
SW2
SW3
SW4
TEC
SW5 ^{Internal Erase starts}
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Publication Release Date: May 2000
Revision A1