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参数资料
| 型号： | W28J800BT90L |
| 厂商： | WINBOND ELECTRONICS CORP |
| 元件分类： | PROM |
| 英文描述： | 512K X 16 FLASH 2.7V PROM, 90 ns, PDSO48 |
| 封装： | 12 X 20 MM, TSOP-48 |
| 文件页数： | 16/49页 |
| 文件大小： | 1527K |
| 代理商： | W28J800BT90L |
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W28J800B/T
Publication Release Date: April 11, 2003
- 23 -
Revision A4
Bus Operation Command
Comments
Write
Read Status
Register
Data = 70H
Addr = X
Read
Status Register Data
Standby
Check SR.7
1 = WSM Ready
0 = WSM Busy
Write
Erase Setup
Data = 20H
Addr = X
Write
Erase
Confirm
Data = D0H
Addr = Within Block to
be Erased
Read
Status Register Data
Standby
Check SR.7
1 = WSM Ready
0 = WSM Busy
Repeat for subsequent block erasures. Full status
check can be done after each block erase or after a
sequence of block erasures. Write FFH after the last
operation to place device in read array mode.
Start
Write 70H
SR.7=
Write 20H
Read Status
Register
SR.7=
Full Status
Check if Desired
Block Erase
Complete
Read Status
Register
Write D0H,
Block Address
1
0
1
0
Suspend Block
Suspend
Block Erase
Erase Loop
No
Yes
Full STATUS CHECK PROCEDURE
Read Status Register
Data(See Above)
SR.3=
SR.1=
SR.4,5=
SR.5=
Block Erase
Sucessfully
0
1
Vpp Range Error
Device Protect Error
Command Sequence
Block Erase Error
Error
Bus Operation Command
Comments
Standby
Check SR.3
1=
VPP Error Detect
Standby
Check SR.1
1 = Device Protect
Detect
Standby
Check SR.4, 5
Both 1 = Command
Sequence Error
Standby
Check SR.5
1 = Block Erase Error
SR.5, SR.4, SR.3 and SR.1 are only cleared by the
Clear Status Register Command in cases where
multiple blocks are erased before full status is
checked.
If error is detected, clear the Status Register before
attempting retry or other error recovery.
Figure 6. Automated Block Erase Flowchart
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