©2014 Silicon Storage Technology, Inc.

DS20005016C

11/14

9

512 Kbit / 1 Mbit / 2 Mbit / 4 Mbit 1.8V SPI Serial Flash

SST25WF512 / SST25WF010 / SST25WF020 / SST25WF040

EOL Data Sheet

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 (BP2, BP1, BP0)

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

against any memory Write (Program or Erase) operation, see Tables 5-7. The Write-Status-Register

(WRSR) instruction is used to program the BP1 and BP0 bits as long as WP# is high or the Block-Pro-

tect-Lock (BPL) bit is ‘0’. Chip-Erase can only be executed if Block-Protection bits are all ‘0’. After

power-up, BP2, BP1, and BP0 are set to defaults. See Table 4 for defaults at power-up.

Block Protection Lock-Down (BPL)

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

Table 5: Software Status Register Block Protection for SST25WF512

Protection Level

Status Register Bit

Protected Memory Address

1. Default at power-up for BP1 and BP0 is ‘11’.

BP0

512 Kbit

None

0

0

None

1 (Upper Quarter Memory)

0

1

00C000H-00FFFFH

2 (Upper Half Memory)

1

0

008000H-00FFFFH

3 (Full Memory)

1

1

000000H-00FFFFH

T5.1 20005016

Table 6: Software Status Register Block Protection for SST25WF010

Protection Level

Status Register Bit

Protected Memory Address

1. Default at power-up for BP1 and BP0 is ‘11’.

BP0

1 Mbit

None

0

0

None

1 (Upper Quarter Memory)

0

1

018000H-01FFFFH

2 (Upper Half Memory)

1

0

010000H-01FFFFH

3 (Full Memory)

1

1

000000H-01FFFFH

T6.0 20005016

Table 7: Software Status Register Block Protection for SST25WF020

Protection Level

Status Register Bit

Protected Memory Address

1. Default at power-up for BP1 and BP0 is ‘11’.

BP0

2 Mbit

None

0

0

None

1 (Upper Quarter Memory)

0

1

030000H-03FFFFH

2 (Upper Half Memory)

1

0

020000H-03FFFFH

3 (Full Memory)

1

1

000000H-03FFFFH

T7.0 20005016