MT28F128J3FS-12 ET Micron, MT28F128J3FS-12 ET Datasheet - Page 38
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MT28F128J3FS-12 ET
Manufacturer Part Number
MT28F128J3FS-12 ET
Description
128Mb Q-Flash - OBSOLETE
Manufacturer
Micron
Datasheet
1.MT28F128J3FS-12_ET.pdf
(55 pages)
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09005aef80b5a323
MT28F640J3.fm – Rev. N 3/05 EN
Figure 16: PROTECTION REGISTER
FULL STATUS CHECK PROCEDURE
Write Protect Register
Read Status Register
(Protection Register
PROGRAMMING Flowchart
Data (see above)
Check if Desired
Program Setup)
Address/Data
Read Status
Full Status
PROGRAM
SR3, SR4 =
PROGRAM
SR1, SR4 =
SR1, SR4 =
Write C0h
Successful
Complete
Register
SR7 = 1
Start
Yes
1, 1
0, 1
1, 1
No
PROTECTION REGISTER
Attempted Program to
PROGRAMMING Error
Locked Register –
V
PEN
Aborted
Range Error
38
BUS OPERATION COMMAND
WRITE
WRITE
READ
STANDBY
PROTECTION PROGRAM operations can only be addressed within
the protection register address space. Addresses outside the
defined space will return an error.
Repeat for subsequent programming operations.
SR full status check can be done after each program or after a
sequence of program operations.
Write FFh after the last program operation to reset device to
read array mode.
BUS OPERATION COMMAND
STANDBY
STANDBY
STANDBY
SR3, if set during a program attempt, MUST be cleared before
further attempts are allowed by the ISM.
SR1, SR3, and SR4 are only cleared by the CLEAR STATUS
REGISTER command, in cases of multiple protection register
program operations, before full status is checked.
If an error is detected, clear the status register before
attempting retry or other error recovery.
Micron Technology, Inc., reserves the right to change products or specifications without notice.
PROTECTION
PROGRAM
SETUP
PROTECTION
PROGRAM
128Mb, 64Mb, 32Mb
Q-FLASH MEMORY
COMMENTS
SR1 SR3 SR4
COMMENTS
Data = C0h
Data = Data to Program
Addr = Location to Program
Status Register Data
Toggle CE# or OE# to
update status register data
Check SR7
1 = ISM Ready
0 = ISM Busy
0 xxx1 xxx1 xxvV
0 xxx1 xxx1 xxvProtection
1 xxx0 xxx1 xxvRegister
©2000 Micron Technology. Inc.
Register
Program
Error
Locked:
Aborted
PEN
LOW
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