CC1110-RTR1 datasheet(122/203 Pages) TI

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CC1110

CC1110 PRELIMINARY Datasheet (Rev. 1.01) SWRS033A

Page 122 of 202

ADCCON3 (0xB6) – ADC Control 3

Bit

Name

Reset

R/W

Description

Selects reference voltage used for the extra conversion

Internal 1.25V reference

External reference on AIN7 pin

AVDD pin

7:6

EREF[1:0]

R/W

External reference on AIN6-AIN7 differential input

Sets the decimation rate used for the extra conversion. The

decimation rate also determines the resolution and time required to

complete the conversion.

64 dec rate (8 bits resolution)

128 dec rate (10 bits resolution)

256 dec rate (12 bits resolution)

5:4

EDIV[1:0]

R/W

512 dec rate (13 bits resolution)

Extra channel select. Selects the channel number of the extra

conversion that is carried out after a conversion sequence has

ended. As long as these bits remain at “0000”, no extra conversion

is performed. If the ADC is not running, writing to these bits will

trigger an immediate single conversion from the selected extra

channel. The bits are automatically cleared when the extra

conversion has finished.

0000

AIN0

0001

AIN1

0010

AIN2

0011

AIN3

0100

AIN4

0101

AIN5

0110

AIN6

0111

AIN7

1000

AIN0-AIN1

1001

AIN2-AIN3

1010

AIN4-AIN5

1011

AIN6-AIN7

1100

GND

1101

Positive voltage reference

1110

Temperature sensor

3:0

ECH[3:0]

0000

R/W

1111

VDD/3

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