AM29F004B AMD [Advanced Micro Devices], AM29F004B Datasheet - Page 30

• 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
28
A18 – A0
A18 – A0
D7 – D0
D7 – D0
JEDEC
WE#
WE#
OE#
CE#
OE#
CE#
Parameter
V SS , V IL
or V IH
V SS , V IL
or V IH
V ID
V ID
Device is in either Temporary Sector Unprotect
mode or command mode Sector Protect/Unprotect.
Device is ready to read from array.
t
Std.
VIDR
t VIDR
t VIDR
Description
V
ID
Rise and Fall Time (Not 100% tested)
Figure 16. Sector Unlock Sequence Timing Diagram
A D V A N C E
555h
AAh
XXXh
Figure 17. Sector Relock Timing Diagram
90h
Am29F004B
I N F O R M A T I O N
2AAh
55h
Min
F0h or 00h
XXXh
If 20h is written, Sector Unprotect mode
is enabled. If 24h is written, command mode
Sector Protect/Unprotect is enabled.
Device exits Temporary Sector Unprotect mode
or command mode Sector Protect/Unprotect.
Returns to reading array data.
All Speed Options
20h/24h
555h
500
t VIDR
0 V or 5 V
8/5/05
Unit
ns