25LC1024 datasheet(14/34 Pages) MICROCHIP

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25LC1024

DS22064D-page 14

 2010 Microchip Technology Inc.

2.8

PAGE ERASE

The Page Erase function will erase all bits (FFh) inside

the given page. A Write Enable (WREN) instruction

must be given prior to attempting a Page Erase. This

is done by setting CS low and then clocking out the

proper instruction into the 25LC1024. After all eight

bits of the instruction are transmitted, the CS must be

brought high to set the write enable latch.

The Page Erase function is entered by driving CS low,

followed by the instruction code (Figure 2-8), and

three address bytes. Any address inside the page to

be erased is a valid address.

CS must then be driven high after the last bit if the

address or the Page Erase will not execute. Once the

CS is driven high, the self-timed Page Erase cycle is

started. The WIP bit in the STATUS register can be

read to determine when the Page Erase cycle is

complete.

If a Page Erase function is given to an address that

has been protected by the Block Protect bits (BP0,

BP1) then the sequence will be aborted and no erase

will occur.

FIGURE 2-8:

PAGE ERASE SEQUENCE

SCK

23456789 10 11

29 30 31

23 22 21 20

210

Instruction

24-bit Address

High-Impedance

25LC1024 Datasheet(PDF) 14 Page - Microchip Technology