JS48F4400PCZ00 datasheet(76/102 Pages) NUMONYX

76 / 102 page

Numonyx™ Wireless Flash Memory (W18)

Datasheet

November 2007

Order Number: 290701-18

Numonyx™ Wireless Flash Memory (W18)

Figure 33: Protection Register Programming Flowchart

FULL STATUS CHECK PROCEDURE

Protection Program operations 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.

SR[3] MUST be cleared before the WSM will allow further

program attempts.

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

If an error is detected, clear the status register before

attempting a program retry or other error recovery.

Yes

1,1

1,0

1,1

PROTECTION REGISTER PROGRAMMINGPROCEDURE

Start

Write C0h

Addr=Prot addr

Write Protect.

Address / Data

Read Status

SR[7] = 1?

Full Status

Check

(if desired)

Program

Complete

Read SRD

Program

Successful

SR[4:3] =

SR[4,1] =

PP Range Error

Programming Error

Locked-Register

Program Aborted

Standby

Bus

Operation

Command

SR[1] SR[3] SR[4]

011

PP Error

Protection register

program error

Comments

Write

Standby

Protection

Program

Setup

Protection

Program

Data = C0h

Addr = Protection address

Data = Data to program

Addr = Protection address

Check SR[7]

1 = WSM Ready

0 = WSM Busy

Bus

Operation

Command

Comments

Read

Read SRD

Toggle CE# or OE# to update SRD

Standby

Operation aborted

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