AT49BV160D 查看數據表（PDF） - Atmel Corporation

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AT49BV160D

16-megabit (1M x 16) 3-volt Only Flash Memory

Atmel Corporation 

17. Protection Register Programming

Flowchart

Start

Write C0,

Any Address

(Program-Setup)

Write PR

Address Data

(Confirm Data)

Read-Status

Register

SR7 = 0

1

Full-Status

Check

(If Desired)

Program

Complete

18. Protection Register Programming

Procedure

Bus

Operation Command Comments

Write

Program

PR Setup

Data = C0

Addr = Any Address

Write

Protection Data = Data to Program

Program Addr = Location to Program

Read

None

Status register data: Toggle CE

or

OE to update status register data

Check SR7

Idle

None

1 = WSM Ready

0 = WSM 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.

19. Full Status Check Flowchart

Read Status

Register Data

SR3, SR4 = 1

0

SR3, SR4 = 1

0

SR3, SR4 = 1

0

Program

Successful

VPP Range Error

Program Error

Register Locked;

Program Aborted

20. 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

Check SR1, SR3, SR4:

Idle

None

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.

14 AT49BV160D(T)

3591C–FLASH–6/06

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