upd78f0103hmca1-5a4-a Renesas Electronics Corporation., upd78f0103hmca1-5a4-a Datasheet - Page 199

• Manufacturer Part Number: upd78f0103hmca1-5a4-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(11) A/D converter sampling time and A/D conversion start delay time
Note The A/D conversion start delay time is the time after the wait period. For the wait function, see CHAPTER 27
Remark f
FR2
Sampling timing
0
0
0
1
1
1
The A/D converter sampling time differs depending on the set value of the A/D converter mode register (ADM). A
delay time exists until actual sampling is started after A/D converter operation is enabled.
When using a set in which the A/D conversion time must be strictly observed, care is required regarding the
contents shown in Figure 10-21 and Table 10-3.
Other than above
CAUTIONS FOR WAIT.
Table 10-3. A/D Converter Sampling Time and A/D Conversion Start Delay Time (ADM Set Value)
X
INTAD
FR1
ADCS
: High-speed system oscillation frequency
0
0
1
0
0
1
Figure 10-21. Timing of A/D Converter Sampling and A/D Conversion Start Delay
ADCS ← 1 or ADS rewrite
FR0
0
1
0
0
1
0
288/f
240/f
192/f
144/f
120/f
96/f
Setting prohibited
period
Wait
X
X
X
X
X
X
conversion
start delay
Conversion Time
A/D
time
CHAPTER 10 A/D CONVERTER
User’s Manual U16846EJ3V0UD
Sampling
time
Conversion time
40/f
32/f
24/f
20/f
16/f
12/f
Sampling Time
X
X
X
X
X
X
−
32/f
28/f
24/f
16/f
14/f
12/f
A/D Conversion Start Delay Time
X
X
X
X
X
X
MIN.
−
Sampling
Conversion time
time
36/f
32/f
28/f
18/f
16/f
14/f
X
X
X
X
X
X
MAX.
−
Note
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