12

AT49LL080

3273C–FLASH–5/03

Table 7. Sector-locking Registers for AT49LL080

Register Name

Sector Size

Register Memory Address (ID [3:0] = 0000)

Default Value

Type

LR15

64K

FF7F0002H

01H

R/W

LR14

64K

FF7E0002H

01H

R/W

LR13

64K

FF7D0002H

01H

R/W

LR12

64K

FF7C0002H

01H

R/W

LR11

64K

FF7B0002H

01H

R/W

LR10

64K

FF7A0002H

01H

R/W

LR9

64K

FF790002H

01H

R/W

LR8

64K

FF780002H

01H

R/W

LR7

64K

FF770002H

01H

R/W

LR6

64K

FF760002H

01H

R/W

LR5

64K

FF750002H

01H

R/W

LR4

64K

FF740002H

01H

R/W

LR3

64K

FF730002H

01H

R/W

LR2

64K

FF720002H

01H

R/W

LR1

64K

FF710002H

01H

R/W

LR0

64K

FF700002H

01H

R/W

FGPI-REG

FF7C0100H

N/A

RO

Table 8. Function of Sector-locking Bits

Bit

Function

7:3

Reserved

2

Read Lock

1 = Prevents read operations in the sector where set.

0 = Normal operation for reads in the sector where clear. This is the default state.

1

Lock-down

1 = Prevents further set or clear operations to the Write Lock and Read Lock bits. Lock-down can only be set, but

not cleared. The sector will remain locked-down until reset (with RST or INIT), or until the device is power-cycled.

0 = Normal operation for Write Lock and Read Lock bits altering in the sector where clear. This is the default state.

0

Write Lock

1 = Prevents program or erase operations in the sector where set. This is the default state.

0 = Normal operation for programming and erase in the sector where clear.