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M
1
6
C
2 /
9
G
o r
u
p
15.1.5 Repeat Sweep Mode 1
In repeat sweep mode 1, analog voltage is applied to the all selected pins are converted to a digital code,
with mainly used in the selected pins. Table 15.7 shows the repeat sweep mode 1 specifications. Figure
15.14 shows the operation example in repeat sweep mode 1. Figure 15.15 shows registers ADCON0 to
ADCON2 in repeat sweep mode 1.
Table 15.7 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 registers AD0 to AD7 that corresponds to the selected pin
NOTES:
1. AN0
to AN0
0
However, all input pins need to belong to 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 15.14 Operation Example in Repeat Sweep Mode 1
R
e
. v
1
1 .
2
M
r a
3 .
, 0
2
0
0
7
R
E
J
0
9
B
0
1
0
1
0 -
1
1
2
Bits SCAN1 and SCAN0 in the ADCON1 register and bits ADGSEL1 and
ADGSEL0 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
TRG
to 1 (A/D conversion started)
(1)
(4 pins)
3
, AN 2
to AN2
, and AN3
7
0
7
to A/D sweep pins (SCAN1 to SCAN0 = 00
0
page 236
f o
4
5
8
Specification
0
AN
AN
AN
1
0
pin input changes state from "H" to "L" after setting the ADST bit
(1 pins), AN
to AN
0
0
to AN3
can be used in the same way as AN
0
2
AN
AN
, and so on.
2
0
3
(2 pins), AN
to AN
1
0
2
)
2
A/D pin input voltage
sampling
A/D pin conversion
15. A/D Converter
(3 pins), AN
to
0
to AN
.
0
7
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