R01UH0136EJ0210 Rev.2.10
Page 626 of 800
Jul 31, 2012
M16C/64A Group
27. A/D Converter
27.3
Operations
27.3.1
A/D Conversion Cycle
A/D conversion cycle is based on fAD and
φ
AD. Divide fAD so
φ
AD conforms the standard frequency.
Figure 27.2 shows fAD and
Figure 27.2
fAD and
φ
AD
Figure 27.3 shows A/D Conversion Timing.
Figure 27.3
A/D Conversion Timing
CKS0: Bit in the ADCON0 register
CKS1: Bit in the ADCON1 register
CKS2: Bit in the ADCON2 register
Select A/D conversion speed
1
CKS0
φ
AD
CKS1
CKS2
1
1/2
1/2
0
1
0
0
fAD
fAD
1/3
f1
Sampling time
First bit conversion time
Second
bit
End
processing
End
processing
Open-circuit
detection
charge time
Open-circuit
detection
Start
processing
Start
processing
Processing
cycle
1 to 2
fAD
2
φ
AD
15
φ
AD
Third bit
Tenth bit
25
φ
AD
2 to 3
fAD
40
φ
AD
42
φ
AD
The above figure applies under the following conditions:
y
One-shot mode
y
φ
AD = fAD
Compare
time
Compare
time
Compare
time
Compare
time
Содержание M16C/60 Series
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