RC28F256 Intel Corporation, RC28F256 Datasheet - Page 89

• Manufacturer Part Number: RC28F256
• Description: Intel StrataFlash Embedded Memory
• Manufacturer: Intel Corporation

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Figure 44.
Datasheet
Block Erase Flowchart
Block Address
Block Address
Status Check
Read Status
Read Status
Block Erase
Block Erase
Write 0x20,
Write 0xD0,
(if desired)
Successful
Full Erase
Complete
SR[4,5] =
Register
Register
SR[7] =
SR[3] =
SR[5] =
SR[1] =
Start
1
0
0
0
0
1
1,1
1
1
(Erase Confirm)
0
(Block Erase)
Intel StrataFlash
Order Number: 306666, Revision: 001
Sequence Error
Block Locked
Block Erase
V
Command
Suspend
PP
Erase
Error
Error
Error
FULL ERASE STATUS CHECK PROCEDURE
Range
No
BLOCK ERASE PROCEDURE
Yes
Suspend
®
Erase
Loop
Embedded Memory (P30)
Operation Command
Repeat for subsequent block erasures.
Full Status register check can be done after each block erase
or after a sequence of block erasures.
Write 0xFF after the last operation to enter read array mode.
Operation
Only the Clear Status Register command clears SR[1, 3, 4, 5].
If an error is detected, clear the Status register before
attempting an erase retry or other error recovery.
Write
Write
Read
Bus
Bus
Idle
Idle
Idle
Idle
Idle
Command
Confirm
Block
Erase
Setup
Erase
None
None
None
None
None
None
Data = 0x20
Addr = Block to be erased (BA)
Data = 0xD0
Addr = Block to be erased (BA)
Status Register data.
Check SR[7]:
1 = WSM ready
0 = WSM busy
Check SR[3]:
1 = V
Check SR[4,5]:
Both 1 = Command Sequence Error
Check SR[5]:
1 = Block Erase Error
Check SR[1]:
1 = Attempted erase of locked block;
erase aborted.
PP
Range Error
Comments
Comments
1-Gbit P30 Family
April 2005
89