JS48F4400P0P3C0 datasheet(108/139 Pages) NUMONYX

108 / 139 page

Numonyx™ StrataFlash® Cellular Memory (M18)

Datasheet

April 2008

108

309823-10

Figure 59: Protection Register Programming Flowchart

FULL STATUS CHECK PROCEDURE

Program Protection Register operation addresses must be

within the Protection Register address space. Addresses

outside this space will return an error.

Repeat for subsequent programming operations.

Full Status Register check can be done after each program, or

after a sequence of program operations.

Write 0xFF after the last operation to set Read Array state

SR[3] must be cleared before the Write State Machine will

allow further program attempts.

Only the Clear Staus Register command clears SR[1 , 3, 4].

If an error is detected, clear the Status register before

attempting a program retry or other error recovery.

PROTECTION REGISTER PROGRAMMING PROCEDURE

Start

Write 0xC0,

PR Address

Write PR

Address & Data

Read Status

SR[7] =

Full Status

Check

(if desired)

Program

Complete

Read Status

Protection Register

Program Fail

SR[3] =

VPP Range Error

Bus

Operation

Command

Comments

Write

Idle

Program

PR Setup

Protection

Program

None

Data = 0xC0

Addr = First Location to Program

Data = Data to Program

Addr = Location to Program

Check SR[7]:

1 = WSM Ready

0 = WSM Busy

Bus

Operation

Command

Comments

Read

None

Status Register Data.

(Program Setup )

(Confirm Data)

SR[4] =

SR[1] =

Program Aborted

Idle

None

Check SR[1]:

1 = Block locked; operation aborted

Idle

None

Check SR[4]:

1 =Programming Error

Idle

None

Check SR[3]:

1 =VPP Range Error

Protection Register

Program Pass

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