AT52SC1283J datasheet(14/52 Pages) ATMEL

14 / 52 page

3530B–STKD–2/4/05

AT52SC1283J/1284J [Preliminary]

6.21

Word Program Flowchart

Program

Suspend

Loop

Start

Write 40,

Word Address

Write Data,

Word Address

Read Status

SR7 =

Full Status

Check

(If Desired)

Program

Complete

Suspend?

Yes

(Setup)

(Confirm)

6.22

Word Program Procedure

Bus

Operation

Command

Comments

Write

Program

Setup

Data = 40

Addr = Location to program

Write

Data

Data = Data to program

Addr = Location to program

Read

None

Status register data: Toggle CE

OE to update status register

Idle

None

Check SR7

1 = WSM Ready

0 = WSM Busy

Repeat for subsequent Word Program operations.

Full status register check can be done after each program, or

after a sequence of program operations.

Write FF after the last operation to set to the Read state.

6.23

Full Status Check Flowchart

Read Status

Program

Successful

SR3 =

SR1 =

SR4 =

PP Range

Error

Device

Protect Error

Program

Error

6.24

Full Status Check Procedure

Bus

Operation

Command

Comments

Idle

None

Check SR3:

1 = V

PP Error

Idle

None

Check SR4:

1 = Data Program Error

Idle

None

Check SR1:

1 = Sector locked; operation

aborted

SR3 MUST be cleared before the Write State Machine allows

further program attempts.

If an error is detected, clear the status register before

continuing operations – only the Clear Status Register

command clears the status register error bits.

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