CC2430
Peripherals : ADC
ADCCON2 (0xB5) – ADC Control 2
Bit
Name
Reset
R/W
Description
7:6
00
R/W
Selects reference voltage used for the sequence of conversions
SREF[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
01
R/W
Sets the decimation rate for channels included in the sequence of
conversions. The decimation rate also determines the resolution
and time required to complete a conversion.
SDIV[1:0]
SCH[3:0]
00
01
10
11
64 decimation rate (7 bits resolution)
128 decimation rate (9 bits resolution)
256 decimation rate (10 bits resolution)
512 decimation rate (12 bits resolution)
3:0
0000
R/W
Sequence Channel Select. Selects the end of the sequence. A
sequence can either be from AIN0 to AIN7 (SCH<=7) or from the
differential input AIN0-AIN1 to AIN6-AIN7 (8<=SCH<=11). For
other settings, only single conversions are performed.
When read, these bits will indicate the channel number plus one of
current conversion result.
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 132 of 211
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
