MCP4728EV datasheet(31/50 Pages) MICROCHIP

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Quick Start Instructions

DS51837A-page 27

1.3.2.12

EXAMPLE 6: SEQUENTIAL WRITE FOR DAC INPUT REGISTERS AND

EEPROM

This command writes to the DAC input registers and EEPROM sequentially from a start

channel to the channel D. The input register is written at the ACK pulse of the input data

byte of each register. However, the EEPROM are written altogether at the same time

sequentially at the end of the last byte. The EEPROM writing activity can be monitored

through the RDY/BSY bit and pin. See the MCP4728 data sheet for details.

Figure 1-18 shows an example of writing a script file on PICkit Serial PC GUI for this

command.

FIGURE 1-18:

Writing Script file to write the Channel B to Channel D. This command writes to both

the input registers and EEPROM: (a) Channel B Settings: VREF = VDD and Gain = 1. (b) Channel C

Settings: VREF = Internal (2.048V), Gain = 1. (c) Channel D Settings: VREF = Internal (2.048V), Gain = 2.

The DAC outputs are updated immediately with the ACK pulse. This example uses the UDAC bit to update

the DAC outputs.

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.

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