Single Sweep Mode - Renesas M16C FAMILY series Hardware Manual
16-bit single-chip microcomputer
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Also See for M16C FAMILY series:
- User manual (380 pages) ,
- Hardware manual (257 pages) ,
- User manual (103 pages)
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6
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15.1.3 Single Sweep Mode
In single sweep mode, analog voltages applied to the selected pins are converted one-by-one to a digital
code. Table 15.5 shows the single sweep mode specifications. Figure 15.10 shows the operation ex-
ample in single sweep mode. Figure 15.11 shows the ADCON0 to ADCON2 registers in single sweep
mode.
Table 15.5 Single Sweep Mode 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 • A/D conversion completed(When selecting a software trigger, the ADST bit
Interrupt Request Generation Timing A/D conversion completed
Analog Input Pin
Readout of A/D Conversion Result
NOTES:
1. AN0
to AN0
and AN 2
0
7
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 15.10 Operation Example in Single Sweep Mode
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2
0 .
0
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3
, 1
2
0
0
7
R
E
J
0
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B
0
0
4
7
0 -
2
0
0
2 /
, 8
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1
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2 /
8
) B
The SCAN1 to SCAN0 bits in the ADCON1 register and the ADGSEL1 to
ADGSEL0 bits in the ADCON2 register select pins. Analog voltage applied to
the selected pins is converted one-by-one to a digital code
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)
is set to "0" (A/D conversion halted)).
• Set the ADST bit to "0"
Select from AN
0
AN
to AN
(8 pins)
0
7
Readout one of the AD0 to AD7 registers that corresponds to the selected pin
to AN2
can be used in the same way as AN
0
7
to AN
0
page 227
f o
3
8
5
Specification
to AN
(2 pins), AN
to AN
1
0
(1)
to A/D sweep pins (SCAN1 to SCAN0="01
3
A/D interrupt request generated
15. A/D Converter
(4 pins), AN
to AN
(6 pins),
3
0
5
to AN
. However, all input pins
0
7
")
2
A/D pin input voltage
sampling
A/D pin conversion
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