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R01UH0336EJ0102 Rev.1.02
Page 1289 of 1538
Jul 17, 2014
V850E2/PG4-L
Section 23 A/D Converter
Caution
Do not set values other than those listed in Table 23-3, Total Conversion Times
(10- and 12-bit Resolution) in the above registers.
Table 23-3
Total Conversion Times (10- and 12-bit Resolution)
Note 1. The discharge time in the table indicates the time discharge takes (the actual
discharge time (ADCAnDISCNT.ADCAnDISCNT[3:0]) + 1).
Note 2. Be sure to make this setting if the channel S/H function is to be enabled.
Note 3. Be sure to make this setting if the buffer amplifier is to be enabled.
Note 1. Be sure to make this setting if the channel S/H function is to be enabled.
Note 2. Be sure to make this setting if the buffer amplifier is to be enabled.
When discharge is ON
PCLK
[MHz]
ADCAn
TCLK
[MHz]
Total
conversion
time
[us]
Overhead
time
[us]
Settings
Discharge
time
[us]
Sampling
time
[us]
A/D
conversion
time
[us]
ADCAn
CTL1.
ADCAn
FR [1:0]
ADCAn
SHHWCNT.
ADCAn
SHHWCNT
[4:0]
ADCAn
DISCNT.A
DCAn
DISCNT
[3:0]
ADCAn
AMPCNT.
ADCAn
AMPCNT
[3:0]
ADCAn
SMCNT.
ADCAn
ADNSMP
[7:0]
80
PCLK/2
1.600
0.325
0.525
0.750
0.100
01
H
8
H
C
H
A
H
22
H
64
PCLK/2
1.813
0.344
0.531
0.938
0.125
01
H
7
H
A
H
8
H
1C
H
48
PCLK
1.458
0.333
0.500
0.625
0.104
00
H
A
H
F
H
C
H
28
H
40
PCLK
1.575
0.325
0.500
0.750
0.125
00
H
8
H
C
H
A
H
21
H
32
PCLK
1.781
0.344
0.500
0.938
0.156
00
H
7
H
A
H
8
H
1B
H
24
PCLK
2.125
0.375
0.500
1.250
0.208
00
H
5
H
8
H
6
H
15
H
When discharge is OFF
PCLK
[MHz]
ADCAn
TCLK
[MHz]
Total
conversion
time
[us]
Overhead
time
[us]
Settings
Sampling
time
[us]
A/D
conversion
time
[us]
ADCAn
CTL1.
ADCAn
FR [1:0]
ADCAn
SHHWCNT.
ADCAn
SHHWCNT
[4:0]
ADCAn
AMPCNT.
ADCAn
AMPCNT
[3:0]
ADCAn
SMCNT.
ADCAn
ADNSMP
[7:0]
80
PCLK/2
1.275
0.525
0.750
0.100
01
H
8
H
A
H
15
H
64
PCLK/2
1.469
0.531
0.938
0.125
01
H
7
H
8
H
11
H
48
PCLK
1.125
0.500
0.625
0.104
00
H
A
H
C
H
18
H
40
PCLK
1.250
0.500
0.750
0.125
00
H
8
H
A
H
14
H
32
PCLK
1.438
0.500
0.938
0.156
00
H
7
H
8
H
10
H
24
PCLK
1.792
0.542
1.250
0.208
00
H
5
H
6
H
0D
H
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