AM29F040 AMD [Advanced Micro Devices], AM29F040 Datasheet - Page 17

• Manufacturer Part Number: AM29F040
• Description: 4 Megabit (524,288 x 8-Bit) CMOS 5.0 Volt-only, Sector Erase Flash Memory
• Manufacturer: AMD [Advanced Micro Devices]

Note:
DQ6 is rechecked even if DQ5 = “1” because DQ6 may stop toggling at the same time as DQ5 changing to “1”.
V
CC
+ 0.5 V
+0.8 V
–0.5 V
2.0 V
Figure 6. Maximum Negative Overshoot Waveform
Figure 7. Maximum Positive Overshoot Waveform
V
CC
–2.0 V
+ 2.0 V
No
Figure 5. Toggle Bit Algorithm
DQ6 = Data
DQ6 = Data
(DQ0–DQ7)
(DQ0–DQ7)
Read Byte
Read Byte
Addr = VA
Addr = VA
DQ5 = 1
Start
20 ns
Fail
20 ns
?
?
?
Am29F040
Yes
Yes
Yes
20 ns
20 ns
No
No
VA = Byte address for programming
20 ns
20 ns
Pass
= Any of the sector addresses within the
= XXXXH during chip erase
sector being erased during sector erase
operation
17113E-10
17113E-11
17113E-12
17