25LC020AT-ISLASHST datasheet(9/28 Pages) MICROCHIP

Numer części	25LC020AT-I/ST

Szczegółowy opis	2K SPI Bus Serial EEPROM

PDF	28 Pages

Scroll/Zoom	100%

Producent	MICROCHIP [Microchip Technology]

Strona internetowa	http://www.microchip.com

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9 / 28 page

Preliminary

DS21833C-page 9

25AA020A/25LC020A

2.4

Write Enable (WREN) and Write

Disable (WRDI)

The 25XX020A 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

•WP pin is brought low

FIGURE 2-4:

WRITE ENABLE SEQUENCE (WREN)

FIGURE 2-5:

WRITE DISABLE SEQUENCE (WRDI)

SCK

high-impedance

SCK

2345

high-impedance

25LC020AT-I/ST Arkusz danych(PDF) 9 Page - Microchip Technology