JS48F4400P0P3C0 datasheet(103/139 Pages) NUMONYX

103 / 139 page

April 2008

Datasheet

309823-10

103

Numonyx™ StrataFlash® Cellular Memory (M18)

Figure 54: Buffered Program Flowchart

Write Confirm 0xD0

and Block Address

Buffer Program Data,

Word Address

X = 0

Abort Buffer

Program?

X = N?

Write Buffer Data,

Word Address

X = X + 1

Write to another

Block Address

Buffer Program Aborted

Yes

Write Word Count-1,

Buffer Address

Suspend

Program

Loop

Read Status Register

SR[7] =?

Full Status

Check if Desired

Program Complete

Suspend

Program?

Yes

NOTES:

1. The device outputs the Status Register when read.

2. The device outputs the array data when read.

3. Buffer Programming is available in the main array only. This

algorithm may be used for MLC or PSBC programming. Upon

issuing 0xE9 the partition state does not changed.

4. Word count value on D[8:0] is loaded into the word count

5. Buffer address on A[MAX:9] specifies a single 512-word

buffer-size array region. This is latched and held constant

during the entire operation.

6. The word address within the buffer, specified by A [8:0], is

provided. Upper address bits are ignored.

7. The device aborts the Buffer Program command if the current

address is outside the original block address .

8. Upon issuing 0xD0 the partition is placed in Status Read

mode. If block address changes, Buffer Program will abort.

9. The Status Register indicates an improper command

sequence if the Buffer Program command is aborted; use the

Clear Status Register command to clear error bits.

Full status check can be done after all erase and write

sequences complete. For a detailed flowchart, please refer to

‘Full Status Check Procedure’ flowchart under ‘Word Program

for Main Array’ flowchart.

Write 0xFF after the last operation to place the partition in the

Read Array state.

Read

(Note 1)

Standby

Read

(Note 9)

None

Idle

None

Write

(Note 2)

Read Array

Write

(Note 3)

Buffer Prog.

Setup

SR[7] = Valid

Addr = Block Address

Check SR[7]:

1 = WSM Ready

0 = WSM Busy

Status register Data

Addr = Block Address

Check SR[7]:

1 = Write Buffer available

0 = No Write Buffer available

Data = 0xFF

Addr = Block Address

Data = 0xE9

Addr = Block Address

Write

(Note 8)

Buffer Prog.

Conf.

Data = 0xD0

Addr = Block Address

Write

(Notes 4,5)

None

Data = N = Word Count - 1

(N = 0 corresponds to count = 1)

Addr = Buffer Address

Write

(Notes 6, 7)

None

Data = Write Buffer Data

Addr = Word Address

Write

(Notes 6, 7)

None

Data = Write Buffer Data

Addr = Word Address

Buffer Programming Procedure

Flash Ready?

SR[7] =

Timeout?

0 = No

1 = Yes

Issue Read Status

at Partition Address

Yes

Issue Buffer Prog. Cmd.

0xE9,

Block Address

Set Timeout or

Loop Counter

Issue Read Array

Command at Partition

Address

Timeout error

Bus

Operation

Command

Comments

1 = Yes

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