SLAS366 datasheet(29/56 Pages) TI2

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4–1

4 Control Register Content Description

4.1

Control Register 1

ADOVF

IIR

DAOVF

BIASV

ALB

DLB

DAC16

R/W

NOTE: R = Read, W = Write

Table 4–1. Control Register 1 Bit Summary

BIT

NAME

RESET

VALUE

FUNCTION

ADOVF

ADC over flow. This bit indicates whether the ADC is overflow.

ADOVF = 0 No overflow.

ADOVF = 1 A/D is overflow.

Continuous data transfer mode. This bit selects between programming mode and continuous data transfer

mode.

CX = 0

Programming mode.

CX = 1

Continuous data transfer mode.

IIR

IIR Filter. This bit selects between FIR and IIR for decimation/interpolation low-pass filter.

IIR = 0

FIR filter is selected.

IIR = 1

IIR filter is selected.

DAOVF

DAC over flow. This bit indicates whether the DAC is overflow

DAOVF = 0 No overflow.

DAOVF = 1 DAC is overflow

BIASV

Bias voltage. This bit selects the output voltage for BIAS pin

BIASV = 0

BIAS pin = 2.35V

BIASV = 1

BIAS pin = 1.35V

ALB

Analog loop back

DLB = 0

Analog loopback disabled

DLB = 1

Analog loopback enabled

DLB

Digital loop back

DLB = 0

Digital loopback disabled

DLB = 1

Digital loopback enabled

DAC16

DAC 16-bit data format. This bit applies to the continuous data transfer mode only to enable the 16-bit data

format for DAC input.

DAC16 = 0

DAC input data length is 15 bits. Writing a 1 to the LSB of the DAC input to switch from continuous

data transfer mode to programming mode.

DAC16 = 1

DAC input data length is 16 bit.

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