AT52SC1283J datasheet(18/52 Pages) ATMEL

18 / 52 page

3530B–STKD–2/4/05

AT52SC1283J/1284J [Preliminary]

6.33

Protection Register Programming

Flowchart

Start

Write C0,

PR Address

Write PR

Address & Data

Read Status

SR7 =

Full Status

Check

(If Desired)

Program

Complete

(Program Setup)

(Confirm Data)

6.34

Protection Register Programming

Procedure

Bus

Operation

Command

Comments

Write

Program

PR Setup

Data = C0

Addr = First Location to Program

Write

Protection

Program

Data = Data to Program

Addr = Location to Program

Read

None

Status register data: Toggle CE

OE to update status register data

Idle

None

Check SR7

1 = WSMS Ready

0 = WSMS Busy

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 FF after the last operation to return to the Read mode.

6.35

Full Status Check Flowchart

0, 1

1, 1

Read Status

Program

Successful

PP Range Error

Program Error

Program Aborted

SR1, SR4

SR3, SR4

1, 1

6.36

Full Status Check Procedure

Bus

Operation

Command

Comments

Idle

None

Check SR1, SR3, SR4:

0,1,1 = VPP Range Error

Idle

None

Check SR1, SR3, SR4:

0,0,1 = Programming Error

Idle

None

Check SR1, SR3, SR4:

1, 0,1 = Sector locked; operation

aborted

SR3 must be cleared before the Write State Machine allows

further program attempts.

Only the Clear Status Register command clears SR1, SR3,

SR4.

If an error is detected, clear the status register before

attempting a program retry or other error recovery.

AT52SC1283J Datasheet(PDF) 18 Page - ATMEL Corporation

AT52SC1283J Datasheet(HTML) 18 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

Datasheet Download

Link URL