25AA160C-E View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

25AA160C-E

16K SPI Bus Serial EEPROM

Microchip Technology 

25XX160C/D

2.4 Write Enable (WREN) and Write

Disable (WRDI)

The 25XX160C/D 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)

CS

SCK

01234567

SI

00000110

High-Impedance

SO

FIGURE 2-5: WRITE DISABLE SEQUENCE (WRDI)

CS

SCK

01234567

SI

0 0 0 0 0 1 10 0

High-Impedance

SO

 2009-2013 Microchip Technology Inc.

DS22150B-page 9

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