28F004/400B3, 28F008/800B3, 28F016/160B3, 28F320B3, 28F640B3
Appendix E Program and Erase Flowcharts
Figure 10. Program Flowchart
Start
Bus Operation
Command
Comments
Write
Write
Program Setup
Program
Data = 40H
Write 40H
Data = Data to Program
Addr = Location to Program
Program Address/Data
Read Status Register
Status Register Data Toggle
CE# or OE# to Update Status
Register Data
Read
Check SR.7
1 = WSM Ready
0 = WSM Busy
Standby
Repeat for subsequent programming operations.
No
SR.7 = 1?
Yes
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.
Full Status
Check if Desired
Program Complete
FULL STATUS CHECK PROCEDURE
Read Status Register
Data (See Above)
Bus Operation
Standby
Command
Comments
Check SR.3
1
1 = VPP Low Detect
SR.3 =
VPP Range Error
Check SR.4
1 = VPP Program Error
Standby
0
SR.4 =
0
Check SR.1
1
1
1 = Attempted Program to
Locked Block - Program
Aborted
Standby
Programming Error
SR.3 MUST be cleared, if set during a program attempt, before further
attempts are allowed by the Write State Machine.
Attempted Program to
Locked Block - Aborted
SR.1 =
SR.1, SR.3 and SR.4 are only cleared by the Clear Staus Register Command,
in cases where multiple bytes are programmed before full status is checked.
0
If an error is detected, clear the status register before attempting retry or other
error recovery.
Program Successful
0580_E1
48
3UHOLPLQDU\
INTEL [ INTEL ]
