Datasheet

DocID024020 Rev 2 15/34
M24C01/02-W M24C01/02-R M24C02-F Instructions
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5.1.2 Page Write
The Page Write mode allows up to 16 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, A8/A4, are the same. If more bytes are sent than will 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 16 bytes 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 6. After each transferred byte, the internal page address counter is
incremented.
The transfer is terminated by the bus master generating a Stop condition.
Figure 6. Write mode sequences with WC = 1 (data write inhibited)
Stop
Start
Byte Write Dev select Byte address Data in
WC
Start
Page Write Dev select Byte address Data in 1 Data in 2
WC
Data in 3
AI02803d
Page Write
(cont'd)
WC (cont'd)
Stop
Data in N
ACK ACK NO ACK
R/W
ACK ACK NO ACK NO ACK
R/W
NO ACK NO ACK