M24C64-R datasheet(22/54 Pages) STMICROELECTRONICS

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M24C64-R Datasheet(PDF) 22 Page - STMicroelectronics

Part #	M24C64-R

Description	64-Kbit serial I²C bus EEPROM

PDF	54 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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22 / 54 page

Instructions

M24C64-W M24C64-R M24C64-F M24C64-DF

22/54

DS6638 Rev 36

5.4

Read the lock status

(M24C64-D only)

The locked/unlocked status of the Identification page can be checked by transmitting a

specific truncated command [Identification Page Write instruction + one data byte] to the

device. The device returns an acknowledge bit if the Identification page is unlocked,

otherwise a NoAck bit if the Identification page is locked.

Right after this, it is recommended to transmit to the device a Start condition followed by a

Stop condition, so that:

•

Start: the truncated command is not executed because the Start condition resets the

device internal logic,

•

Stop: the device is then set back into Standby mode by the Stop condition.

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