LH28F008SC-L120 View Datasheet(PDF) - Sharp Electronics

Part Name

Description

Manufacturer

LH28F008SC-L120

Flash Memory 8M (1MB × 8)

Sharp Electronics 

sharp

LHF08CH1

22

Start

Write 60H

Write D0H

Read

Status Register

0

SR.7=

1

Full Status

Check if Desired

Bus

Operation

Write

Write

Command

Comments

Clear Block

Lock-Bits Setup

Data=60H

Addr=X

Clear Block

Lock-Bits Confirm

Data=D0H

Addr=X

Read

Status Register Data

Standby

Check SR.7

1=WSM Ready

0=WSM Busy

Write FFH after the Clear Block Lock-Bits operation to

place device in read array mode.

Clear Block Lock-Bits

Complete

FULL STATUS CHECK PROCEDURE

Read Status Register

Data(See Above)

1

SR.3=

0

VPP Range Error

1

SR.1=

Device Protect Error

0

1

SR.4,5=

0

Command Sequence

Error

1

SR.5=

0

Clear Block Lock-Bits

Successful

Clear Block Lock-Bits

Error

Bus

Operation

Command

Comments

Standby

Standby

Standby

Check SR.3

1=VPP Error Detect

Check SR.1

1=Device Protect Detect

RP#=VIH, Master Lock-Bit is Set

Check SR.4,5

Both 1=Command

Sequence Error

Standby

Check SR.5

1=Clear Block Lock-Bits Error

SR.5,SR.4,SR.3 and SR.1 are only cleared by the Clear Status

Register command.

If error is detected, clear the Status Register before attempting

retry or other error recovery.

Figure 10. Clear Block Lock-Bits Flowchart

Rev. 1.3

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