M24256-BFDW6TP STMicroelectronics, M24256-BFDW6TP Datasheet - Page 21

• Manufacturer Part Number: M24256-BFDW6TP
• Description: EEPROM 256 Kbit EEPROM Three Chip Enable
• Manufacturer: STMicroelectronics

Specifications of M24256-BFDW6TP

• Product Category: EEPROM
• Rohs: yes

M24256-BW M24256-BR M24256-BF M24256-DR M24256-DF
5.4
6
Read the lock status (M24256-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:
●
●
Initial delivery state
The device is delivered with all the memory array bits and Identification page bits set to 1
(each byte contains FFh).
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.
Doc ID 6757 Rev 30
Initial delivery state
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