AT49BV160C ATMEL Corporation, AT49BV160C Datasheet - Page 13

• Manufacturer Part Number: AT49BV160C
• Description: 16-megabit (1M x 16) 3-volt Only Flash Memory
• Manufacturer: ATMEL Corporation

Sector Erase Flowchart
Full Erase Status Check Flowchart
3367D–FLASH–5/04
Sector
Sector
Sector
Status Check
Read Status
(If Desired)
Write 20,
Full Erase
Complete
Write D0,
Register
SR7 =
Start
Sector
Address
Address
Erase
Read Status
Successful
1
SR4, SR5
Register
SR5 =
SR1 =
SR3 =
Erase
0
0
0
0
(Erase Confirm)
=
0
(
Sector
1
1,1
1
1
Erase)
Suspend
Erase
Sequence Error
Sector
Sector
V
Command
No
P P
Error
Error
Error
Range
Locked
Erase
Yes
Suspend
Erase
Loop
Sector Erase Procedure
Full Erase Status Check Procedure
Repeat for subsequent sector erasures.
Full status register check can be done after each sector erase, or after a
sequence of sector erasures.
Write FF after the last operation to enter read mode.
SR1, SR3 must be cleared before the Write State Machine allows further
erase attempts.
Only the Clear Status Register command clears SR1, SR3, SR4, SR5.
If an error is detected, clear the status register before attempting an
erase retry or other error recovery.
Operation
Operation
Read
Write
Write
Bus
Bus
Idle
Idle
Idle
Idle
Idle
Command
Command
Confirm
Sector
Erase
Setup
Erase
None
None
None
None
None
None
Comments
Data = 20
Addr = Sector to be erased (SA)
Data = D0
Addr = Sector to be erased (SA)
Status register data: Toggle CE or
OE to update status register data
Check SR7
1 = WSM Ready
0 = WSM Busy
Comments
Check SR3:
1 = V
Check SR4, SR5:
Both 1 = Command Sequence Error
Check SR5:
1 = Sector Erase Error
Check SR1:
1 = Attempted erase of locked sector;
erase aborted.
PP
Range Error
AT49BV160C(T)
13