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AT49BV040B-TU Datasheet(PDF) 6 Page - ATMEL Corporation

Part # AT49BV040B-TU
Description  4-megabit (512K x 8) Flash Memory
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT49BV040B-TU Datasheet(HTML) 6 Page - ATMEL Corporation

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6
3499B–FLASH–4/06
AT49BV040B
Figure 4-1.
Data Polling Algorithm
Figure 4-2.
Toggle Bit Algorithm
Notes:
1. VA = Valid address for programming. During a sector
erase operation, a valid address is any sector
address within the sector being erased. During chip
erase, a valid address is any non-protected sector
address.
2. I/O7 should be rechecked even if I/O5 = “1” because
I/O7 may change simultaneously with I/O5.
Note:
1. The system should recheck the toggle bit even if
I/O5 = “1” because the toggle bit may stop toggling
as I/O5 changes to “1”.
START
Read I/O7 - I/O0
Addr = VA
I/O7 = Data?
I/O5 = 1?
Read I/O7 - I/O0
Addr = VA
I/O7 = Data?
Program/Erase
Operation Not
Successful, Write
Product ID
Exit Command
NO
NO
NO
YES
YES
YES
Program/Erase
Operation
Successful,
Device in
Read Mode
START
Read I/O7 - I/O0
Read I/O7 - I/O0
Toggle Bit =
Toggle?
I/O5 = 1?
Read I/O7 - I/O0
Twice
Toggle Bit =
Toggle?
Program/Erase
Operation Not
Successful, Write
Product ID
Exit Command
Program/Erase
Operation
Successful, Device
in Read Mode
NO
NO
NO
YES
YES
YES


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