AM29F040 AMD [Advanced Micro Devices], AM29F040 Datasheet - Page 16

• 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]

16
Note:
DQ7 is rechecked even if DQ5 = “1” because DQ7 may change simultaneously with DQ5.
Figure 3. Data Polling Algorithm
No
DQ7 = Data
DQ7 = Data
(DQ0–DQ7)
(DQ0–DQ7)
Read Byte
Read Byte
Addr = VA
Addr = VA
DQ5 = 1
Start
Fail
?
?
?
Am29F040
No
Yes
No
Yes
Yes
VA = Byte address for programming
Pass
= Any of the sector addresses within the
= XXXXH during chip erase
sector being erased during sector erase
operation
17113E-9