M24512-R datasheet(12/47 Pages) STMICROELECTRONICS

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5.1.2

Page write

The page write mode allows up to 128 byte 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, A15/A7, are the same. If more

bytes are sent than fit up to the end of the page, a “roll-over” occurs, i.e. the bytes exceeding the page end are

written on the same page, from location 0.

The bus master sends from 1 to 128 byte of data, each of which is acknowledged by the device if write control

(WC) is low. If write control (WC) is high, the contents of the addressed memory location are not modified, and

each data byte is followed by a NoAck, as shown in Figure 8. After each transferred byte, the internal page

address counter is incremented.

The transfer is terminated by the bus master generating a stop condition.

Figure 8. Write mode sequences with WC = 1 (data write inhibited)

Page write

Page write (cont’d)

WC (cont’d)

Byte write

M24512-W M24512-R M24512-DF

Write operations

DS6520 - Rev 31

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