Table of Contents
Advertisement
M16C/29 Group
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 15.1.5.1 shows the repeat sweep mode 1 specifications.
Figure 15.1.5.1 shows the operation example in repeat sweep mode 1. Figure 15.1.5.2
ADCON0 to ADCON2 registers in repeat sweep mode 1.
Table 15.1.5.1 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
Note1. AN
to AN
00
07
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 15.1.5.1 Operation Example in Repeat Sweep Mode 1
Rev.1.00 Nov 01,2004
REJ09B0101-0100Z
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)
0
(4 pins) (Note 1)
3
, AN
to AN
, and AN
20
27
to A/D sweep pins (SCAN1 to SCAN0="00
0
page 228 of 402
Specification
0
AN
AN
AN
1
0
2
(1 pins), AN
to AN
(2 pins), AN
0
1
to AN
can be used in the same way as AN
30
32
")
2
15. A/D Converter
AN
AN
, and so on.
0
3
to AN
(3 pins), AN
0
2
0
A/D pin input voltage
sampling
A/D pin conversion
shows the
to
0
to AN
.
7
Advertisement
Table of Contents
