Chapter 14
A/D Converter
Operation XIV - 35
■ Setup Example of Multiple Channels/One-Time Conversion for Each
A/D converter result can be obtained with feeding analog voltage by the ADIN00 and ADIN01 pins. Conversion
is performed regularly with the timer 12 compare A matching.
Figure:14.3.7 1-channel A/D Conversion
Table:14.3.6 Conditions for Multiple Channel A/D Conversion ·
An example setup procedure, with a description of each step is shown below.
Setting item Description
Input pin
ADIN00 pin
ADIN01 pin
ADIN02 pin
Operation mode Multiple channels/one-time conversion for each
A/D converter start trigger Timer 12 compare A
A/D converter start cycle 1ms
IOCLK 30MHz
Setup Procedure Description
(1) Set the AD0: Stop the A/D conversion
operation
AN0CTR0(0x0000A400)
bp7: AN0EN=0
bp5:AN0TRG=0
(1) Set the AN0EN and AN0TRG flags of the A/D0
conversion control register (AN0CTR0) to “0” to stop A/
D conversion.
(2) Set the AD0: Disable the AD0 complete
interrupt
G26ICR(0x00008968)
bp8: G26IE0=0
(2) Set the G26IE0 flag of the G26ICR register to “0” to
disable the AD0 conversion complete interrupt.
(3) Set the timer 11: Stop the timer 12
TM12MD(0x0000A280)
bp6: TMLDE=0
bp7: TMCNE=0
(3) Set the TMLDE and TMCNE flags of the timer 12 mode
register (TM12MD) to “0” to stop the timer 12 counting.
Volume3Volume2
0
5
10
Volume1
0
5
10
0
5
10
AD conversion
ch0
ch1
ch2
Data buffer
External tri
er( Timer 12 compareA match )
CPU Core
MN103S
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