參數(shù)資料
型號： RC28F256P33T85A
廠商： NUMONYX
元件分類： PROM
英文描述： 16M X 16 FLASH 3V PROM, 85 ns, PBGA64
封裝： BGA-64
文件頁數(shù)： 69/96頁
文件大?。?/td> 1378K
代理商： RC28F256P33T85A
November 2007
Datasheet
Order Number: 314749-05
71
Numonyx StrataFlash Embedded Memory (P33)
Figure 35: Buffer Program Flowchart
Start
Get Next
Target Address
Issue Write to Buffer
Command E8h and
Block Address
Read Status Register
(at Block Address)
Is WSM Ready?
SR.7 =
1 = Yes
Device
Supports Buffer
Writes?
Set Timeout or
Loop Counter
Timeout
or Count
Expired?
Write Confirm D0h
and Block Address
Another Buffered
Programming?
Yes
No
Write Buffer Data,
Start Address
X = 0
Yes
0 = No
No
Yes
Use Single Word
Programming
Abort Bufferred
Program?
No
X = N?
Write Buffer Data,
Block Address
X = X + 1
Write to another
Block Address
Buffered Program
Aborted
No
Yes
Write Word Count,
Block Address
1. Word count values on DQ0-DQ7 are loaded into the Count
register. Count ranges for this device are N = 0000h to 0001Fh.
2. The device outputs the status register when read.
3. Write Buffer contents will be programmed at the device start
address or destination flash address.
4. Align the start address on a Write Buffer boundary for
maximum programming performance(i.e., A4–A0 of the start
address = 0).
5. The device aborts the Buffered Program command if the
current address is outside the original block address.
6. The Status register indicates an "improper command
sequence" if the Buffered Program command is aborted. Follow
this with a Clear Status Register command.
Full status check can be done after all erase and write
sequences complete. Write FFh after the last operation to reset
the device to read array mode.
Bus
Operation
Standby
Read
Command
Write
Write to
Buffer
Read
Standby
Comments
Check SR.7
1 = WSM Ready
0 = WSM Busy
Status register Data
CE# and OE# low updates SR
Addr = Block Address
Data = E8H
Addr = Block Address
SR.7 = Valid
Addr = Block Address
Check SR.7
1 = Device WSM is Busy
0 = Device WSM is Ready
Write
Program
Confirm
Data = D0H
Addr = Block Address
Write
(Notes1, 2)
Data = N-1 = Word Count
N = 0 corresponds to count = 1
Addr = Block Address
Write
(Notes3, 4)
Data = Write Buffer Data
Addr = Start Address
Write
(Notes5, 6)
Data = Write Buffer Data
Addr = Block Address
Suspend
Program
Loop
Read Status Register
SR.7 =?
Full Status
Check if Desired
Program Complete
Suspend
Program
1
0
No
Yes
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