AT49BV040B Ver la hoja de datos (PDF) - Atmel Corporation
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AT49BV040B Datasheet PDF : 21 Pages
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Figure 4-1. Data Polling Algorithm
START
Figure 4-2. Toggle Bit Algorithm
START
Read I/O7 - I/O0
Addr = VA
I/O7 = Data?
YES
Read I/O7 - I/O0
Read I/O7 - I/O0
Toggle Bit =
NO
NO
Toggle?
NO
I/O5 = 1?
YES
YES
NO
I/O5 = 1?
Read I/O7 - I/O0
Addr = VA
YES
Read I/O7 - I/O0
Twice
I/O7 = Data?
YES
NO
Program/Erase
Operation Not
Successful, Write
Product ID
Exit Command
Program/Erase
Operation
Successful,
Device in
Read Mode
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:
Toggle Bit =
NO
Toggle?
YES
Program/Erase
Operation Not
Successful, Write
Product ID
Exit Command
Program/Erase
Operation
Successful, Device
in Read Mode
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”.
6 AT49BV040B
3499B–FLASH–4/06
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