at49bv320ct ATMEL Corporation, at49bv320ct Datasheet - Page 14

• Manufacturer Part Number: at49bv320ct
• Description: 32-megabit 2m X 16 3-volt Only Flash Memory
• Manufacturer: ATMEL Corporation

17. Protection Register Programming
19. Full Status Check Flowchart
14
Flowchart
AT49BV320C(T)
Register Data
Read Status
Successful
SR3, SR4
SR3, SR4
SR3, SR4
Program
Address & Data
Read Status
PR Address
(If Desired)
0
0
Full Status
Complete
Write C0,
Write PR
0
Program
Register
Check
SR7 =
Start
=
=
=
1
1
1
1
0
(Program Setup)
(Confirm Data)
Register Locked;
Program Aborted
V
Program Error
P P
Range Error
20. Full Status Check Procedure
18. Protection Register Programming
SR3 must be cleared before the Write State Machine allows
further program attempts.
Only the Clear Status Register command clears SR1, SR3,
SR4.
If an error is detected, clear the status register before
attempting a program retry or other error recovery.
Program Protection Register operation addresses must be
within the protection register address space. Addresses
outside this space will return an error.
Repeat for subsequent programming operations.
Full status register check can be done after each program, or
after a sequence of program operations.
Write FF after the last operation to return to the Read mode.
Operation
Operation
Write
Write
Read
Bus
Bus
Idle
Idle
Idle
Idle
Procedure
Command
Command
Protection
PR Setup
Program
Program
None
None
None
None
None
Comments
Check SR1, SR3, SR4:
0,1,1 = V
Check SR1, SR3, SR4:
0,0,1 = Programming Error
Check SR1, SR3, SR4:
1, 0,1 = Sector locked; operation
aborted
Comments
Data = C0
Addr = First Location to Program
Data = Data to Program
Addr = Location to Program
Status register data: Toggle CE
or
OE to update status register data
Check SR7
1 = WSM Ready
0 = WSM Busy
PP
Range Error
3372F–FLASH–4/05