CC2430
Peripherals : ADC
ADCCON3 (0xB6) – ADC Control 3
Bit
Name
Reset
R/W
Description
7:6
00
R/W
Selects reference voltage used for the extra conversion
EREF[1:0]
00
01
10
11
Internal 1.25V reference
External reference on AIN7 pin
AVDD_SOC pin
External reference on AIN6-AIN7 differential input
5:4
00
R/W
Sets the decimation rate used for the extra conversion. The
decimation rate also determines the resolution and time required to
complete the conversion.
EDIV[1:0]
ECH[3:0]
00
01
10
11
64 dec rate (7 bits resolution)
128 dec rate (9 bits resolution)
256 dec rate (10 bits resolution)
512 dec rate (12 bits resolution)
3:0
0000
R/W
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
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN0-AIN1
AIN2-AIN3
AIN4-AIN5
AIN6-AIN7
GND
Positive voltage reference
Temperature sensor
VDD/3
CC2430 Data Sheet (rev. 2.1) SWRS036F
Page 133 of 211
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
