Data Sheet

NAU7802 24-bit ADC

Nuvoton Confidential - 31 - Revision 1.7

11.3 REG0x02:CTRL2

Bit

Name

Description

CHS

Analog input channel select

1 = Ch2

0 = Ch1 (default)

6:4

CRS

Conversion rate select

111 = 320SPS

011 = 80SPS

010 = 40SPS

001 = 20SPS

000 = 10SPS (default)

CAL_ERR

Read Only calibration result

1: there is error in this calibration

0: there is no error

CALS

Write 1 to this bit will trigger calibration based on the

selection in CALMOD[1:0]

This is an "Action" register bit. When calibration is

finished, it will reset to 0

While this bit is still 1, the chip is still calibrating. An

I2C write to this bit will be ignored and no additional

calibration will be triggered

1:0

CALMOD

11 = Gain Calibration System

10 = Offset Calibration System

01 = Reserved

00 = Offset Calibration Internal (default)