MCP4728 datasheet(36/50 Pages) MICROCHIP

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MCP4728 Evaluation Board User’s Guide

DS51837A-page 32

1.3.2.16

EXAMPLE 9: WRITE POWER-DOWN SELECTION BITS IN DAC INPUT

This command writes power-down bits to the DAC input registers.

Figure 1-22 shows an example of writing a new script file for Power-Down mode.

FIGURE 1-22:

Writing Script file to write the power-down bits. The channel outputs are updated

immediately with the ACK pulse. This command does not require UDAC bit or LDAC pin change.

• Parameters in the Script Detail column:

To change value:

•

Click this box and

type a new value

To delete or Insert box:

•

Select the box and

right click the mouse

button for options

available

Make sure the listed

parameters in “script

Detail” are in the exact

order as shown here.

Script Detail

I2CSTART

I2CWRTBYT

-------> This means there are three bytes to send.

-------> Address byte = 1100-0000 (See Note).

-------> Command Type and Power-Down bits for Chs. A and B.

-------> Power-Down bits for Channels C and D.

I2CSTOP

Note:

All parameters above must be listed in order. The parameter above with *

are not modifiable. The MCP4728 device on the evaluation board has I2C

address bits (A2, A1, A0) = (0,0,0).

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