93C76A-ESLASHMS datasheet(13/38 Pages) MICROCHIP

Part #	93C76A-E/MS

Description	1K-16K Microwire Compatible Serial EEPROMs

PDF	38 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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13 / 38 page

DS21929D-page 13

93XX46X/56X/66X/76X/86X

3.6

ERASE/WRITE DISABLE And

ENABLE (EWDS/EWEN)

The 93XX series devices power-up in the Erase/Write

Disable (EWDS) state. All programming modes must

be preceded by an Erase/Write Enable (EWEN) instruc-

tion. Once the EWEN instruction is executed, program-

ming remains enabled until an EWDS instruction is

executed or VCC is removed from the device.

To protect against accidental data disturbance, the

EWDS

instruction can be used to disable all Erase/Write

functions

and

should

all

programming

operations.

Execution

READ

instruction

independent of both the EWEN and EWDS instructions.

FIGURE 3-5:

EWDS TIMING

FIGURE 3-6:

EWEN TIMING

CLK

•••

TCSL

CLK

TCSL

•••

93C76A-E/MS Datasheet(PDF) 13 Page - Microchip Technology