CC2430-RTR1-F64Z datasheet(132/234 Pages) TI

132 / 234 page

CC2430

CC2430 PRELIMINARY Data Sheet (rev. 1.03) SWRS036A

Page 132 of 232

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_SOC 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. This bit field must be written for an extra conversion to be

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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