JS48F4400P0P3C0 datasheet(104/139 Pages) NUMONYX

104 / 139 page

Numonyx™ StrataFlash® Cellular Memory (M18)

Datasheet

April 2008

104

309823-10

Figure 55: Buffered EFP Flowchart

Write Data @ 1

Word Address

Last

Data?

Write 0xFFFF,

Address Not within

Current Block

Program

Done ?

Read Status Reg .

No (SR [7]=0)

Full Status Check

Procedure

Program

Complete

Read Status Reg .

BEFP

Exited?

Yes

(SR [7]=1)

Start

Write 0x80 @

1ST Word Address

VPP applied ,

Block unlocked

Write 0xD0 @

1ST Word Address

BEFP Setup

Done ?

Read Status Reg .

Exit

Program & Verify Phase

Exit Phase

Setup Phase

BUFFERED ENHANCED FACTORY PROGRAMMING(Buffered-EFP) PROCEDURE

X = 512?

Initialize Count :

X = 0

Increment Count :

X = X +1

NOTES:

1. BEFP is available in the main array only .

2. First-word address to be programmed within the target block must be aligned on a write

-buffer boundary .

3. Write-buffer contents are programmed sequentially to the flash array starting at the first word address

; WSM internally increments addressing .

Check VPP , Lock

Errors (SR[3,1])

Yes (SR[7]=0)

Comments

Bus

State

Operation

BEFP setup delay

Data Stream Ready

Repeat for subsequent blocks ;

After BEFP exit , a full Status Register check can

determine if any program error occurred ;

See full Status Register check procedure in the

Word Program flowchart .

Write0xFF to enter Read Array state .

Check SR [7]:

0 = Exit Not Completed

1 = Exit Completed

Check Exit

Status

Read

Status

Data = Status Reg . Data

Address = 1ST Word Addr

BEFP Exit

Standby

If SR[7] is set, check:

SR[3] set = VPP Error

SR[1] set = Locked Block

Error

Condition

Check

Standby

Check SR [7]:

0 = BEFP Ready

1 = BEFP Not Ready

BEFP

Setup

Done ?

Standby

Data = Status Reg . Data

Address = 1ST Word Addr

Status

Read

Data = 0xD0 @ 1

Word Address

BEFP

Confirm

Write

Data = 0x80 @ 1

ST Word

Address

BEFP

Setup

Write

(Note 2)

VPPH applied to VPP

Unlock

Block

Write

BEFP Setup

Bus

State

Comments

Operation

No (SR[0]=1)

Yes (SR[0]=0)

No (SR[7]=1)

BEFP Program & Verify

Comments

Bus State Operation

Write

(Note 3)

Load

Buffer

Standby

Increment

Count

Standby

Initialize

Count

Data = Data to Program

Address = 1ST Word Addr .

X = X+1

X = 0

Standby

Buffer

Full?

X = 512?

Yes = Read SR [0]

No = Load Next Data Word

Read

Standby

Status

Data Stream

Ready ?

Data = Status Register Data

Address = 1ST Word Addr .

Check SR [ 0]:

0 = Ready for Data

1 = Not Ready for Data

Read

Standby

Write

Status

Program

Done?

Last

Data?

Exit Prog &

Verify Phase

Data = Status Reg . data

Address = 1ST Word Addr .

Check SR [ 0]:

0 = Program Done

1 = Program in Progress

No = Fill buffer again

Yes = Exit

Data = 0xFFFF @ address not in

current block

JS48F4400P0P3C0 Datasheet(PDF) 104 Page - Numonyx B.V

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