©2012 Silicon Storage Technology, Inc.

DS25024C

10/12

10

8 Mbit 1.8V SPI Serial Flash

SST25WF080

Not Recommended for New Designs

Auto Address Increment (AAI)

The Auto Address Increment Programming-Status bit provides status on whether the device is in AAI

programming mode or Byte-Program mode. The default at power up is Byte-Program mode.

Block-Protection (BP3, BP2, BP1, BP0)

The Block-Protection (BP3, BP2, BP1, BP0) bits define the size of the memory area to be software

protected against any memory Write (Program or Erase) operation, see Table 5. The Write-Status-

Register (WRSR) instruction is used to program the BP3, BP2, BP1 and BP0 bits as long as WP# is

high or the Block-Protect-Lock (BPL) bit is ‘0’. Chip-Erase can only be executed if Block-Protection bits

are all ‘0’. After power-up, BP3, BP2, BP1 and BP0 are set to defaults. See Table 4 for defaults at

power-up.

Block Protection Lock-Down (BPL)

is set to ‘1’, it prevents any further alteration of the BPL, BP3, BP2, BP1, and BP0 bits. When the WP#

bit is reset to ‘0’.

Table 5: Software Status Register Block Protection for SST25WF080

Protection Level

Status Register Bit

Protected Memory Address

1. X = Don’t Care (Reserved), default is ‘0’.

2. Default at power-up for BP2, BP1 and BP0 is ‘11’.

8 Mbit

None

X

0

0

0

None

1 (Upper 16th Memory, Blocks 30 and 31)

X

0

0

1

F0000H-FFFFFH

2 (Upper 8th Memory, Blocks 28 to 31)

X

0

1

0

E0000H-FFFFFH

3 (Upper Quarter Memory, Blocks 24 to 31)

X

0

1

1

C0000H-FFFFFH

4 (Upper Half Memory, Blocks 16 to 31)

X

1

0

0

80000H-FFFFFH

5 (Full Memory, Blocks 0 to 31)

X

1

0

1

00000H-FFFFFH

X1

1

0

X1

1

1

T5.1 25024