C2510Fx / CC2511Fx
ADCCON2 (0xB5) – ADC Control 2
Bit
Name
Reset
R/W
Description
Selects reference voltage used for the sequence of conversions
7:6
SREF[1:0]
00
R/W
00
01
10
11
Internal 1.25V reference
External reference on AIN7 pin (only CC2510Fx)
AVDD pin
External reference on AIN6-AIN7 differential input (only CC2510Fx)
5:4
SDIV[1:0]
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.
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
SCH[3:0]
00
R/W
Sequence Channel Select. Selects the end of the sequence.
SCH≤ 0111: A conversion sequence will contain a conversion from each
ADC input, starting at AIN0 and ending at the input programmed in
ADCCON2.SCH.
1000 ≤ SCH≤ 1011: The sequence will start at the differential input pair
(AIN0 – AIN1) and stop at the input pair given by ADCCON2.SCH.
SCH≥ 1100: Only single conversions are performed.
When reading the ADCCON2.SCHbits, the number returned will indicate what
the last conversion was. Please see Section 13.10.2.6 for details.
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
AVDD/3
SWRS055D
Page 144 of 243
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