M25PE10, M25PE20

20/37

Page Erase (PE)

The Page Erase (PE) instruction sets to 1 (FFh) all

bits inside the chosen page. Before it can be ac-

cepted, a Write Enable (WREN) instruction must

previously have been executed. After the Write

Enable (WREN) instruction has been decoded,

the device sets the Write Enable Latch (WEL).

The Page Erase (PE) instruction is entered by

driving Chip Select (S) Low, followed by the in-

struction code, and three address Bytes on Serial

Data Input (D). Any address inside the Page is a

valid address for the Page Erase (PE) instruction.

Chip Select (S) must be driven Low for the entire

duration of the sequence.

The instruction sequence is shown in Figure 16.

Chip Select (S) must be driven High after the

eighth bit of the last address Byte has been

latched in, otherwise the Page Erase (PE) instruc-

tion is not executed. As soon as Chip Select (S) is

driven High, the self-timed Page Erase cycle

Erase cycle is in progress, the Status Register

may be read to check the value of the Write In

Progress (WIP) bit. The Write In Progress (WIP)

bit is 1 during the self-timed Page Erase cycle, and

is 0 when it is completed. At some unspecified

time before the cycle is complete, the Write Enable

Latch (WEL) bit is reset.

A Page Erase (PE) instruction applied to a page

that is Hardware Protected is not executed.

Any Page Erase (PE) instruction, while an Erase,

Program or Write cycle is in progress, is rejected

without having any effects on the cycle that is in

progress.

Figure 16. Page Erase (PE) Instruction Sequence

Note: Address bits A23 to A18 are Don’t Care in the M25PE20. Address bits A23 to A17 are Don’t Care in the M25PE10.

24 Bit Address

C

D

AI04046

S

2

1

3456789

29 30 31

Instruction

0

23 22

2

0

1

MSB