Rainbow Electronics W49F020 - Manual (Page 16)

Preliminary W49F020
- 16 -
Timing Waveforms, continued
Toggle Bit Timing Diagram
Address A17-0
DQ6
CE
OE
WE
T OEH T OES
T BP or T EC
Boot Block Lockout Enable Timing Diagram
SB2 SB1 SB0
Address A17-0
DQ7-0
CE
OE
WE
SB3 SB4 SB5
Six byte code for Boot Block
Lockout Feature Enable
T EC
T WP
T WPH
5555 2AAA 5555 5555 2AAA 5555
XXAA XX55 XX80 XXAA XX55 XX40