
CHAPTER 13 A/D CONVERTER
User’s Manual U17790EJ2V0UD
470
Table 13-3. Conversion Time Selection in High-Speed Conversion Mode (ADA0HS1 Bit = 1)
A/D Conversion Time
ADA0FR3 to
ADA0FR0
Bits
Conversion Time
(+ Stabilization Time)
fXX = 32 MHz
fXX = 20 MHz
fXX = 16 MHz
fXX = 4 MHz
Trigger Response
Time
0000
26/fXX (+ 13/fXX)
Setting prohibited
6.5
s
(+ 3.25
s)
3/fXX
0001
52/fXX (+ 26/fXX)
Setting prohibited
2.6
s
(+ 1.3
s)
3.25
s
(+ 1.625
s)
Setting prohibited
3/fXX
0010
78/fXX (+ 39/fXX)
Setting prohibited
3.9
s
(+ 1.95
s)
4.875
s
(+ 2.4375
s)
Setting prohibited
3/fXX
0011
104/fXX (+ 50/fXX)
3.25
s
(+ 1.5625
s)
5.2
s
(+ 2.5
s)
6.5
s
(+ 3.125
s)
Setting prohibited
3/fXX
0100
130/fXX (+ 50/fXX)
4.0625
s
(+ 1.5625
s)
6.5
s
(+ 2.5
s)
8.125
s
(+ 3.125
s)
Setting prohibited
3/fXX
0101
156/fXX (+ 50/fXX)
4.875
s
(+ 1.5625
s)
7.8
s
(+ 2.5
s)
9.75
s
(+ 3.125
s)
Setting prohibited
3/fXX
0110
182/fXX (+ 50/fXX)
5.6875
s
(+ 1.5625
s)
9.1
s
(+ 2.5
s)
Setting prohibited
3/fXX
0111
208/fXX (+ 50/fXX)
6.5
s
(+ 1.5625
s)
10.4
s
(+ 2.5
s)
Setting prohibited
3/fXX
1000
234/fXX (+ 50/fXX)
7.3125
s
(+ 1.5625
s)
Setting prohibited
3/fXX
1001
260/fXX (+ 50/fXX)
8.125
s
(+ 1.5625
s)
Setting prohibited
3/fXX
1010
286/fXX (+ 50/fXX)
8.9375
s
(+ 1.5625
s)
Setting prohibited
3/fXX
1011
312/fXX (+ 50/fXX)
9.75
s
(+ 1.5625
s)
Setting prohibited
3/fXX
Others
Setting prohibited
Remark
Stabilization time:
A/D converter setup time (1
s or longer)
Conversion time:
Actual conversion time (2.6 to 10.4
s)
Trigger response time: If a software trigger, external trigger, or timer trigger is generated after the
stabilization time, it is inserted before the conversion time.
In the high-speed conversion mode, the conversion is started after the stabilization time elapsed from the
ADA0M0.ADA0CE bit is set to 1, and A/D conversion is performed only during the conversion time (2.6 to
10.4
s). The A/D conversion end interrupt request signal (INTAD) is generated immediately after the
conversion ends.
In continuous conversion mode, the stabilization time is inserted only before the first conversion, and not
inserted after the second conversion (the A/D converter remains running).
Caution
Set as 2.6
s ≤ conversion time ≤ 10.4 s.
<R>