R01UH0092EJ0110 Rev.1.10
Page 630 of 807
Jul 31, 2012
M16C/64C Group
27. A/D Converter
Figure 27.6
A/D Open-Circuit Detection Example on AVCC (Preconversion Charge)
Figure 27.7
A/D Open-Circuit Detection (Charge) Characteristics (Standard Characteristics)
External circuit example
Open-circuit
R
Analog input
ANi
On
Charge
AINRST0 = 1
Off
Sampling
capacitor
Charge
control signal
Discharge
control signal
C
ANi: ANi (i = 0 to 7), ANEXi, AN0-i, AN2-i
AINRST0: Bit in the AINRST register
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The horizontal axis indicates how many times A/D conversion
For example, 20kHz indicates
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Measuring Condition (common)
VCC1 = 5.12 V
Analog input pin is AN0
R = 100 k
Ω
C = 100 pF between AN0 and GND
XIN = 10 MHz
The horizontal axis shows how many times A/D conversion is performed per ms.
For example, 20 kHz indicates A/D conversion is performed every 50
μ
s.
Содержание M16C Series
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