6.1.1

Byte write

After the device select code and the address bytes, the bus master sends one data byte. If the addressed location

is write-protected, by write control WC being driven high, the device replies with noACK, and the location is not

modified, as shown in Figure 7. If, instead, the addressed location is not write-protected, the device replies with

ACK. The bus master terminates the transfer by generating a stop condition, as shown in Figure 6.

Figure 6. Write mode sequence with WC = 0 (data write enabled)

WC

Byte Write

Dev sel

Byte addr

Byte addr

Data in

ACK

ACK

ACK

ACK

RW

WC

Dev sel

Byte addr

Byte addr

ACK

ACK

ACK

ACK

RW

Data in 1

Data in 2

Page Write

Page Write (cont’d)

WC (cont’d)

ACK

ACK

Data in N

M24256E-F

Write operations on memory array

DS12687 - Rev 3

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