MCP4728EV datasheet(48/50 Pages) MICROCHIP

48 / 50 page

MCP4728 Evaluation Board User’s Guide

DS51837A-page 44

Write V

REF, Gain, and Power-Down Select Bits (Note 4)

Not Used

Write Reference

(VREF) selection

bits to Input Regis-

ters

This command writes reference (VREF) selection bits of each

channel.

Not Used

Write Gain selec-

tion bit to Input

Registers

This command writes Gain selection bits of each channel.

Not Used

Write Power-Down

bits to Input Regis-

ters

This command writes Power-Down bits of each channel.

TABLE C-1:

WRITE COMMAND TYPES (CONTINUED)

Command Field

Write

Function

Command Name

Function

Note 1:

The analog output is updated when LDAC pin is (or changes to) “Low”. UDAC bit is not used for this

command.

The DAC output is updated when LDAC pin or UDAC bit is “Low”.

The device starts writing to the EEPROM on the acknowledge clock pulse of the last channel. The device

does not execute any command until RDY/BSY bit comes back to “High”.

The input and output registers are updated at the acknowledge clock pulse of the last byte. The update

does not require LDAC pin or UDAC bit conditions. EEPROM is not affected.

MCP4728EV Datasheet(PDF) 48 Page - Microchip Technology