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参数资料
| 型号： | W28J161BB90L |
| 厂商： | WINBOND ELECTRONICS CORP |
| 元件分类： | PROM |
| 英文描述： | 1M X 16 FLASH 3V PROM, 90 ns, PBGA48 |
| 封装： | 8 X 8 MM, 0.75 MM PITCH, TFBGA-48 |
| 文件页数： | 15/43页 |
| 文件大小： | 1333K |
| 代理商： | W28J161BB90L |
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W28J161B/T
- 22 -
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
Setup Word
Write
Data = 40H or 10H
Addr = X
Write
Word Write
Data = Data to Be Written
Addr = Location to Be
written
Read
Status Register Data
Standby
Check SR.7
1 = WSM Ready
0 = WSM Busy
Repeat for subsequent word writes.
SR full status check can be done after each word write, or
after a sequence of word writes.
Write FFH after the last word write operation to place
device in read array mode.
Start
Write 70H
SR.7=
Write 40H or 10H
Read Status
Register
SR.7=
Full Status
Check if Desired
Word/Byte Write
Complete
Read Status
Register
Write Word/Byte
1
0
1
Data and Adddress
Suspend
Word/Byte
Write Loop
No
Yes
Write
Suspend Word/Byte
0
Full STATUS CHECK PROCEDURE
Read Status Register
Data(See Above)
SR.3=
SR.1=
SR.4=
0
1
Vpp Range Error
Device Protect Error
Word/Byte Write Error
Word/Byte Write
Successfully
Bus Operation
Command
Comments
Standby
Check SR.3
1 = VPP Error Detect
Standby
Check SR.1
1 = Device Protect Detect
Standby
Check SR.4
1 = Data Write Error
SR.4, SR.3 and SR.1 are only cleared by the Clear Status
Register command in cases where multiple locations are
written before full status is checked.
If error is detected, clear the Status Register before
attempting retry or other error recovery.
Figure 7. Automated Word Write Flowchart
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