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14.1.5 Repeat Sweep Mode 1
In repeat sweep mode 1, analog voltages applied to the all selected pins are converted to a digital code,
with mainly used in the selected pins. Table 14.1.5.1 shows the repeat sweep mode 1 specifications.
Figure 14.1.5.1 shows the operation example in repeat sweep mode 1. Figure 14.1.5.2
ADCON0 to ADCON2 registers in repeat sweep mode 1.
Table 14.1.5.1 Repeat Sweep Mode 1 Specifications
Item
Function
A/D Conversion Start Condition • When the TRG bit in the ADCON0 register is "0" (software trigger)
A/D Conversion Stop Condition Set the ADST bit to "0" (A/D conversion halted)
Interrupt Request Generation Timing None generated
Analog Input Pins Mainly Select from AN
Used in A/D Conversions AN
Readout of A/D Conversion Result Readout one of the AD0 to AD7 registers that corresponds to the selected pin
NOTE:
1. AN
to AN
30
32
the same group.
•Example when selecting AN
A/D conversion started
AN
0
AN
1
AN
2
AN
3
AN
4
AN
5
AN
6
AN
7
Figure 14.1.5.1 Operation Example in Repeat Sweep Mode 1
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2
0 .
0
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b
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, 5
2
0
0
7
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E
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0
9
B
0
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0
2
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The SCAN1 to SCAN0 bits in the ADCON1 register and the ADGSEL1 to
ADGSEL0 bits in the ADCON2 register mainly select pins. Analog voltage
applied to the all selected pins is repeatedly converted to a digital code
Example : When selecting AN
Analog voltage is converted to a digital code in the following order
AN
0
Set the ADST bit in the ADCON0 register to "1" (A/D conversion started)
• When the TRG bit in the ADCON0 register is "1" (hardware trigger)
The AD
pin input changes state from "H" to "L" after setting the ADST bit
TRG
to "1" (A/D conversion started)
to AN
(4 pins)
0
3
can be used in the same way as AN
to analog input pins (SCAN1 to SCAN0=00
0
page 194
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) T
Specification
0
AN
AN
AN
1
0
2
(1 pins), AN
to AN
(2 pins), AN
0
0
1
(1)
to AN
. However, all input pins need to belong to
0
7
AN
AN
, and so on.
0
3
to AN
(3 pins),
0
2
)
2
A/D pin input voltage
sampling
A/D pin conversion
14. A/D Converter
shows the
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