HN58X2508I/HN58X2516I

Rev.2.00, Aug.19.2004, page 23 of 27

Protection Modes

Memory protect

W signal

SRWD bit

Mode

Write protection of

the status register

Protected area*

1

Unprotected area*

1

1

0

Software

protected

(SPM)

Status register is

writable (if the WREN)

instruction has set the

WEL bit). The values

in the BP1 and BP0

bits can be changed.

Write protected

Ready to accept

Write instructions

0

0

1

1

0

1

Hardware

protected

(HPM)

Status register is

hardware write

protected. The values

in the BP1 and BP0

bits cannot be

changed.

Write protected

Ready to accept

Write instructions

Note:

1. As defined by the values in the Block Protected (BP1, BP0) bits of the Status Register, as shown in

the former table.