RHRDAC1612 datasheet(13/47 Pages) STMICROELECTRONICS

13 / 47 page

RHRDAC1612

DAC operation

DocID029369 Rev 2

13/47

4.2

DAC configuration registers

Figure 9: Data and control frame format



Address = 01h



Configuration bit register: this 8-bit register is used to configure and control the

DAC.



Offset byte register: this 8-bit register is used to read the result of the offset

calibrati

on of the DAC. The result is in two’s complement format. If the value is in

the range of 01h to FEh, the auto-calibration has gone well. If the value is 00h or

FFh, the device cannot compensate the offset and there is an internal problem. If

the result is 80h, the device has no offset error to compensate.



Address = 02h



DAC data byte: this 16-bit register is used to set the output voltage of the DAC.

Table 5: "DAC configuration bits and function" shows the name and the function of each bit.

Table 5: DAC configuration bits and function

Address

Config.

bit/data

Name

POR or

ASRSTN

value

Read/Write

possibilities

Description

01h

0 = LSB

CAL

Read

This bit gives the calibration status. If

set to 0, it indicates calibration is

ongoing. If set to 1, it indicates

calibration is complete. This bit is

cleared to 0 after reading the

configuration bit register.

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