AM29F004B AMD [Advanced Micro Devices], AM29F004B Datasheet - Page 31

• Manufacturer Part Number: AM29F004B
• Description: 4 Megabit (512 K x 8-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory
• Manufacturer: AMD [Advanced Micro Devices]

AC CHARACTERISTICS
Notes:
1. To enable the command mode sector protection/unprotection
2. For sector protection, a valid address consists of the sector
8/5/05
A18 – A0
D7 – D0
algorithm, the system must issue the command 24h in the sector
unlock sequence.
address with A6 = 0, A5 = 1, A1 = 1, A0 = 0. For sector
WE#
OE#
CE#
V ID
V IH
V SS
Sector Unlock sequence (three cycles)
Figure 18. Sector Protect/Unprotect Timing Diagram
A D V A N C E
XXXh
60h
Am29F004B
I N F O R M A T I O N
Valid (Note 2)
60h
unprotection, a valid address consists of the sector address with
A6 = 1, A5 = 1, A1 = 1, A0 = 0.
Sector Relock sequence (two cycles)
Valid (Note 2)
40h
Array Data
29