25LC080A-ESLASHMS datasheet(9/24 Pages) MICROCHIP

Part #	25LC080A-E/MS

Description	8K SPI Bus Serial EEPROM

PDF	24 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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 2003 Microchip Technology Inc.

DS21808B-page 9

25XX080A/B

2.4

Write Enable (WREN) and Write

Disable (WRDI)

The 25XX080A/B contains a write enable latch.

See

Table 2-4 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.

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

FIGURE 2-4:

WRITE ENABLE SEQUENCE (WREN)

FIGURE 2-5:

WRITE DISABLE SEQUENCE (WRDI)

SCK

34567

high-impedance

0000

SCK

high-impedance

0000

25LC080A-E/MS Datasheet(PDF) 9 Page - Microchip Technology