© 2004 Microchip Technology Inc. DS70064C-page 17-43
Section 17. 10-bit A/D Converter
10-bit A/D
Converter
17
17.15.7 Example: Sampling Eight Inputs Using Sequential Sampling
Figure 17-20 and Table 17-8 demonstrate sequential sampling. When converting more than one
channel and selecting sequential sampling, the module will start sampling a channel at the
earliest opportunity, then perform the required conversions in sequence. In this example, with
ASAM set, sampling of a channel will begin after the conversion of that channel completes.
When ASAM is clear, sampling will not resume after conversion completion but will occur when
setting the SAMP bit.
When utilizing more than one channel, sequential sampling provides more sampling time since
a channel may be sampled while conversion occurs on another.
Figure 17-20: Sampling Eight Inputs Using Sequential Sampling
ADCLK
SAMP
DONE
Input to CH0
AN13-AN1
TSAMP
ADIF
AN0
AN1
AN2
Input to CH1
Input to CH2
Input to CH3
ADCBUFD
ADCBUFE
ADCBUFF
AN14
TSAMP
AN4-AN7
AN5-AN8
AN14
TSAMP
AN3-AN6
AN4-AN7
AN5-AN8
ASAM
AN1
AN2
ADCBUF0
ADCBUF1
ADCBUF2
ADCBUF3
ADCBUFC
AN13-AN1
AN0
AN2
Conversion
Trigger
T
CONVTCONVTCONVTCONV TCONVTCONVTCONVTCONV TCONVTCONVTCONVTCONV
AN3-AN6
AN1
AN13-AN1
AN0
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