128Mb, 256Mb, 512Mb, 1Gb StrataFlash Memory
Flowcharts
Bus
Operation
Action
Comments
Standby
BEFP setup Check SR7:
done?
0 = BEFP ready
1 = BEFP not ready
Standby
Error condi- If SR7 is set, check:
tion check
SR3 set = V PP error
SR1 set = Locked block
Program and Verify Phase
READ
Status register Data = Status register data
Address = First word address
Standby
Data stream Check SR0:
ready?
0 = Ready for data
1 = Not ready for data
Standby
WRITE
Initialize
count
X = 0
Load buffer Data = Data to program
Address = First word address2
Standby
Standby
Increment
count
X = X + 1
Buffer full? X = 512?
Yes = Read SR0
No = Load next data word
READ
Status register Data = Status register data
Address = First word address
Standby
Program
done?
Check SR0:
0 = Program done
1 = Program in progress
Standby
WRITE
Last data?
No = Fill buffer again
Yes = Exit
Exit program Data = 0xFFFF @ address not in current block
and verify
phase
Exit Phase
READ
Status register Data = Status register data
Address = First word address
Standby
Check exit sta- Check SR7:
tus
0 = Exit not completed
1 = Exit completed
1. Repeat for subsequent blocks.
Notes:
2. After BEFP exit, a full status register check can determine if any program error occurred.
3. See the Word Program Full Status Register Check Procedure flowchart.
4. Write 0xFF to enter read array state.
PDF: 09005aef8448483a
128_256_512_65nm_g18.pdf - Rev. F 8/11 EN
Micron Technology, Inc. reserves the right to change products or specifications without notice.
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