MB85RS256

10

DS05-13105-3E

■ BLOCK PROTECT

Writing protect block is configured by the WRITE command with BP1, BP0 value of the status register.

■ WRITING PROTECT

Writing operation of the WRITE command and the WRSR command are protected with the value of WEL, WPEN,

WP as shown in the table.

■ HOLD OPERATION

Hold status is retained without aborting a command if HOLD is “L” while CS is “L”. The timing for starting and

ending hold status depends on the SCK to be “H” or “L” when a HOLD pin input is transited as shown in the

diagram below. Arbitrary command operation is interrupted in hold status, SCK and SI inputs become don’t care.

And, SO becomes High-Z while reading command (RDSR, READ) . If CS is risen with hold status, a command

is aborted and device is reset.

BP1

BP0

Protected Block

00

None

0

1

1

0

1

1

WEL

WPEN

WP

Protected Blocks

Unprotected Blocks

Status Register

0

X

X

Protected

Protected

Protected

1

0

X

Protected

Unprotected

Unprotected

1

1

0

Protected

Unprotected

Protected

1

1

1

Protected

Unprotected

Unprotected

SCK

CS

Hold Condition

HOLD

Hold Condition