AS8FLC2M32BP-90/XT 参数 Datasheet PDF下载

AUSTIN SEMICONDUCTOR, INC.

Austin Semiconductor, Inc.

Sector Un-Protect Algorithm Flow

START

Protect

all sectors:

The indicated portion

of the

sector

protect

algorithm

must

be

performed for

all

unprotected

sectors

prior to issuing the

first

sector

unprotect

address

AS8FLC2M32

FLASH

PLSCNT = 1

RESET# = V

ID

Wait 1 ms

First Write

Cycle = 60h?

No

Temporary

Sector

Unprotect Mode

Yes

No

All

sectors

protected?

Yes

Set

up first

sector

address

Sector

Unprotect:

Write 60h to

sector

address

with

A7 = 1, A2 = 1,

A1 = 0

Wait 15 ms

Verify

Sector

Unprotect: Write

40h to

sector

address

with

A7 = 1, A2 = 1,

A1 = 0

Read from

sector address

with A7 = 1,

A2 = 1, A1 = 0

Set

up

next

sector

address

Increment

PLSCNT

No

PLSCNT

= 1000?

Yes

No

Data = 00h?

Yes

Device failed

Last

sector

verified?

Yes

No

Sector

Unprotect

Algorithm

Remove V

ID

from RESET#

Write reset

command

Sector

Unprotect

complete

AS8FLC2M32B

Rev. 1.2 5/09

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

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