AT49BV642D Datasheet, PDF (8/29 Pages) ATMEL Corporation – 64-megabit (4M x 16) 3-volt Only Flash Memory

Figure 3-1. Data Polling Algorithm
(Configuration Register = 00)
START
Figure 3-2. Data Polling Algorithm
(Configuration Register = 01)
START
Read I/O7 - I/O0
Addr = VA
I/O7 = Data?
YES
NO
NO
I/O3, I/O5 = 1?
YES
Read I/O7 - I/O0
Addr = VA
I/O7 = Data?
YES
NO
Program/Erase
Operation Not
Successful, Write
Product ID
Exit Command
Program/Erase
Operation
Successful,
Device in
Read Mode
Read I/O7 - I/O0
Addr = VA
NO
I/O7 = 1?
YES
NO
I/O3, I/O5 = 1?
YES
Program/Erase
Operation Not
Successful, Write
Product ID
Exit Command
Program/Erase
Operation
Successful,
Write Product ID
Exit Command
Note:
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.
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.
8 AT49BV642D(T)
3631A–FLASH–04/06