25AA080-E View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

25AA080-E

8K SPI Bus Serial EEPROM

Microchip Technology 

25AA080/25LC080/25C080

3.4 Write Enable (WREN) and Write

Disable (WRDI)

The 25XX080 contains a write enable latch. See

Table 3-3 for the Write-Protect Functionality Matrix.

This latch must be set before any write operation will be

completed internally. The WREN instruction will set the

latch, and the WRDI will reset the latch.

FIGURE 3-4:

WRITE ENABLE SEQUENCE

The following is a list of conditions under which the

write enable latch will be reset:

• Power-up

• WRDI instruction successfully executed

• WRSR instruction successfully executed

• WRITE instruction successfully executed

CS

SCK

01234567

SI

00000110

High-impedance

SO

FIGURE 3-5:

WRITE DISABLE SEQUENCE

CS

SCK

01234567

SI

0 0 0 0 0 1 10 0

High-impedance

SO

 1997-2012 Microchip Technology Inc.

DS21230E-page 9

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