256Mb and 512Mb (256Mb/256Mb), P30-65nm
Flowcharts
Figure 18: Buffer Program Procedure
Start
X = X + 1
Write buffer data,
start address
Write buffer data,
(at block address)
within buffer range
No
Device
supports buffer
writes?
No
Use single word
programming
X = 0
Yes
Abort
No
X = N
bufferred program
?
Set timeout or
loop counter
Yes
Yes
Get next
target address
Write confirm D0h
(at block address)
Write to another
block address
Buffered program
aborted
Read status register
(at block address)
CE# and OE# LOW
updates status register
Issue WRITE-to-BUFFER
command E8h
(at block address)
No
Yes
SR7?
1 = Ready
0 = Busy
0
Suspend
program loop
Suspend
program
Read status register
SR7 = Valid
(at block address )
1
No
Full status
check (if desired)
Device
ready? SR7 = 0/1
Timeout
or count expired?
0 = No
Yes
Another
buffered
programming
?
Yes
1 = Yes
Write word count (N-1)
N = 0 corresponds to
count = 1
No
(at block address)
Program
complete
1. Word count values on DQ0:DQ15 are loaded into the count register. Count ranges for
this device are N = 0000h to 01FFh.
Notes:
2. Device outputs the status register when read.
3. Write buffer contents will be programmed at the device start or destination address.
4. Align the start address on a write buffer boundary for maximum programming perform-
ance; that is, A[9:1] of the start address = 0).
5. Device aborts the BUFFERED PROGRAM command if the current address is outside the
original block address.
6. Status register indicates an improper command sequence if the BUFFERED PROGRAM
command is aborted. Follow this with a CLEAR STATUS REGISTER command.
7. Device defaults to SR output data after BUFFERED PROGRAMMING SETUP command
(E8h) is issued . CE# or OE# must be toggled to update the status register . Don’t issue
the READ SR command (70h); it is interpreted by the device as buffer word count.
8. Full status check can be done after erase and write sequences complete. Write FFh after
the last operation to reset the device to read array mode.
PDF: 09005aef84566799
p30_65nm_MLC_256Mb-512mb.pdf - Rev. C 12/13 EN
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