Texas Instruments MSP430x4xx - Manual (Page 387)

ADC12 Operation
20-11 ADC12
Single-Channel Single-Conversion Mode
A single channel is sampled and converted once. The ADC result is written to
the ADC12MEMx defined by the CSTARTADDx bits. Figure 20−6 shows the
flow of the Single-Channel, Single-Conversion mode. When ADC12SC
triggers a conversion, successive conversions can be triggered by the
ADC12SC bit. When any other trigger source is used, ENC must be toggled
between each conversion.
Figure 20−6. Single-Channel, Single-Conversion Mode
ADC12
off
x = CSTARTADDx
Wait for Enable
ENC =
Wait for Trigger
Sample, Input
Channel Defined in
ADC12MCTLx
ENC =
ENC =
SHSx = 0
and
ENC = 1 or
and
ADC12SC =
SAMPCON =
SAMPCON = 1
Convert
SAMPCON =
ENC = 0
ENC = 0 †
12 x ADC12CLK
Conversion
Completed,
Result Stored Into
ADC12MEMx,
ADC12IFG.x is Set
1 x ADC12CLK
†Conversion result is unpredictable
ENC = 0 †
ADC12ON = 1
CONSEQx = 00
x = pointer to ADC12MCTLx