CC2430 Datasheet, PDF (131/234 Pages) Texas Instruments – A True System-on-Chip solution for 2.4 GHz IEEE 802.15.4 / ZigBee-TM

CC2430
ADCCON2 (0xB5) – ADC Control 2
Bit Name
7:6 _SREF[1:0]
5:4 _SDIV[1:0]
3:0 _SCH[3:0]
Reset R/W
00
R/W
01
R/W
00
R/W
Description
Selects reference voltage used for the sequence of conversions
00
Internal 1.25V reference
01
External reference on AIN7 pin
10
AVDD_SOC pin
11
External reference on AIN6-AIN7 differential input
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
64 dec rate (8 bits resolution)
01
128 dec rate (10 bits resolution)
10
256 dec rate (12 bits resolution)
11
512 dec rate (13 bits resolution)
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 of current
conversion result.
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
1111 VDD/3
CC2430 PRELIMINARY Data Sheet (rev. 1.03) SWRS036A
Page 131 of 232