6.1.2

Page write

The page write mode allows up to 32 bytes to be written in a single write cycle, provided they are all located in the

same page in the memory: that is, the most significant memory address bits, A15/A5, are the same. If more bytes

than those that will fit up to the end of the page are sent, 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 32 bytes of data, each one is acknowledged by the device if the software write

protection is disabled with the SWP bit set to '0'. If the software write protection is enabled with the SWP bit set to

'1', 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.

Byte Write

Byte addr

Data in

Page Write

Byte addr

Data in 1

Data in 2

Page Write (cont'd)

Data in N

ACK

ACK

ACK

NO ACK

R/W

ACK

ACK

ACK

NO ACK

R/W

NO ACK

NO ACK

Byte addr

Dev sel

Byte addr

Dev sel

M24128X-FCU

Write operations on memory array

DS12680 - Rev 2

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