13

5167E–SFLSH–5/09

AT25FS010

BLOCK ERASE (BLOCK ERASE): The BLOCK ERASE instruction sets all 32K bytes in the

selected block to logic 1 or erased state. In order to block erase the AT25FS010, two sep-

arate instructions must be executed. First, the device must be write enabled via the

WREN instruction. Then the BLOCK ERASE instruction can be executed and will erase

every byte in the selected block if the block is not locked out. The block address is auto-

matically determined if any address within the block is selected (see Figure 5-11). The

BLOCK ERASE instruction is internally controlled and self timed to completion. During

this time, all commands will be ignored except RDSR instruction. The progress or com-

pletion of the erase operation can be determined by reading ready/busy bit (bit 0) through

RDSR instruction. If Bit 0=1, block erase cycle is in progress. If Bit0=0, the erase opera-

tion has been completed. The AT25FS010 will automatically return to the write disable

state at the completion of the BLOCK ERASE cycle.

CHIP ERASE (CHIP ERASE): As an alternative to the SECTOR ERASE/BLOCK ERASE, the

CHIP ERASE instruction will erase every byte in all sectors that are not locked out. First, the

device must be write enabled via the WREN instruction. Then the CHIP ERASE instruction can

be executed. The CHIP ERASE instruction is internally controlled; it will automatically be timed

to completion. The CHIP ERASE cycle time typically is 8 seconds. During the internal erase

Table 4-8.

Sector and Block Address

Block 4

1/4

1/8

1/16

1/32

Sector 8

01FFFFH

01F000H

Sector 7

01EFFFH

01E000H

Sector 6

01DFFFH

01D000H

Sector 5

01CFFFH

01C000H

Sector 4

01BFFFH

01B000H

Sector 3

01AFFFH

01A000H

Sector 2

019FFFH

019000H

Sector 1

018FFFH

018000H

Block 3

017FFFH

010000H

Block 2

00FFFFH

008000H

Block 1

007FFFH

000000H