LH28F800BJE-PTTLZ1 Datasheet, PDF (28/47 Pages) Sharp Electrionic Components – 8M (x8/x16) Flash Memory

LHF80JZB
26
Start
Write 70H
Read Status
Register
0
SR.7=
1
Write C0H
Write Data and Address
Read
Status Register
0
SR.7=
1
Full Status
Check if Desired
OTP Program
Complete
FULL STATUS CHECK PROCEDURE
Read Status Register
Data(See Above)
1
SR.3=
0
1
SR.1=
0
1
SR.4=
0
OTP Program Successful
V_CCW Range Error
Device Protect Error
OTP Program Error
Bus
Operation
Write
Read
Standby
Write
Write
Command
Comments
Read Status
Register
Data=70H
Addr=X
Status Register Data
Setup OTP Program
OTP Program
Check SR.7
1=WSM Ready
0=WSM Busy
Data=C0H
Addr=X
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 OTP programs.
SR full status check can be done after each OTP program, or after a sequence of
OTP programs.
Write FFH after the last OTP program operation to place device in read array mode.
Bus
Operation
Command
Comments
Standby
Standby
Check SR.3
1=V_CCW Error Detect
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 13. Automated OTP Program Flowchart
Rev. 1.27