M24C16-DFCU6TP datasheet(16/35 Pages) STMICROELECTRONICS

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Instructions

M24C16-DFCU

16/35

DocID026468 Rev 2

5.1.2

Page Write

The Page Write mode allows up to N(a) bytes to be written in a single Write cycle, provided

that they are all located in the same page in the memory: that is, the most significant

memory address bits, A10/A4, are the same. If more bytes are sent than will fit up to the end

of the page, a condition known as “roll-over” occurs. In case of roll-over, the first bytes of the

page are overwritten.

Note:

After each byte is transferred, the internal byte address counter is incremented. The transfer

is terminated by the bus master generating a Stop condition.

5.1.3

Write Identification Page

The Identification Page (16 bytes) is an additional page which can be written and (later)

permanently locked in Read-only mode. It is written by issuing the Write Identification Page

instruction. This instruction uses the same protocol and format as Page Write (into memory

array), except for the following differences:



Device type identifier = 1011b



Most significant address bits A10/A4 are don't care, except for address bit A7 which

must be “0”. Least significant address bits A3/A0 define the byte location inside the

Identification page.

If the Identification page is locked, the data bytes transferred during the Write Identification

Page instruction are not acknowledged (NoAck).

5.1.4

Lock Identification Page

The Lock Identification Page instruction (Lock ID) permanently locks the Identification page

in Read-only mode. The Lock ID instruction is similar to Byte Write (into memory array) with

the following specific conditions:



Device type identifier = 1011b



Address bit A7 must be ‘1’; all other address bits are don't care



The data byte must be equal to the binary value xxxx xx1x, where x is don't care

M24C16-DFCU6TP Datasheet(PDF) 16 Page - STMicroelectronics