upd78f9211grt2-jjg-a ETC-unknow, upd78f9211grt2-jjg-a Datasheet - Page 148

• Manufacturer Part Number: upd78f9211grt2-jjg-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: ETC-unknow

Notes 1.
148
AV
AV
AV
AV
Range
Caution The above sampling time and conversion time do not include the clock frequency error. Select
Remarks 1.
Reference
REF
REF
REF
REF
Voltage
≥ 4.5 V
≥ 4.0 V
≥ 2.85 V
≥ 2.7 V
2.
3.
Note 1
Set the sampling time as follows.
Set the A/D conversion time as follows.
Be sure to set the FR2, FR1, and FR0, in accordance with the reference voltage so that Notes 2 and 3
below are satisfied.
Example When AV
• The sampling time is 11.0
• Set FR2, FR1, and FR0 = 0, 1, 1 or 1, 1, 1.
• V
• V
• V
• V
• V
• V
• V
• V
2.
the sampling time and conversion time such that Notes 2 and 3 above are satisfied, while taking
the clock frequency error into consideration (an error margin maximum of ±5% when using the
high-speed internal oscillator).
less.
DD
DD
DD
DD
DD
DD
DD
DD
12/f
24/f
96/f
48/f
48/f
24/f
176/f
88/f
Sampling
Time
f
The conversion time refers to the total of the sampling time and the time from successively
comparing with the sampling value until the conversion result is output.
≥ 4.5 V:
≥ 4.0 V:
≥ 2.85 V:
≥ 2.7 V:
≥ 4.5 V:
≥ 4.0 V:
≥ 2.85 V:
≥ 2.7 V:
XP
XP
XP
XP
XP
XP
XP
XP
: Oscillation frequency of clock to peripheral hardware
XP
Note 2
Conversion
36/f
72/f
144/f
96/f
72/f
48/f
224/f
112/f
Time
Table 9-1. Sampling Time and A/D Conversion Time
XP
XP
XP
XP
XP
REF
XP
XP
XP
Note 3
1.0
2.4
3.0
11.0
3.0
4.8
6.0
14.0
≥ 2.7 V, f
µ
µ
µ
µ
µ
µ
s or more
s or more
s or more
µ
s or more and less than 100
s or more and less than 100
s or more and less than 100
µ
s or more
s or more and less than 100
µ
1.5
3.0
12.0
6.0
6.0
3.0
22.0
11.0
Sampling
Time
s or more and the A/D conversion time is 14.0
CHAPTER 9 A/D CONVERTER
XP
µ
µ
µ
µ
µ
User’s Manual U16994EJ3V0UD
s
s
µ
s
s
s
µ
µ
= 8 MHz
Note 2
s
s
s
f
XP
= 8 MHz
Conversion
4.5
9.0
18.0
12.0
9.0
6.0
28.0
14.0
Time
µ
µ
µ
µ
s
s
µ
µ
s
s
µ
µ
Note 3
s
s
s
s
µ
µ
µ
1.2
2.4
9.6
4.8
4.8
Setting
prohibited
(2.4
17.6
Setting
prohibited
(8.8
s
s
s
µ
Sampling
Time
s
µ
µ
µ
µ
µ
µ
µ
s
s
s
s
s
µ
s)
s)
Note 2
s
f
XP
= 10 MHz
3.6
7.2
14.4
9.6
7.2
Setting
prohibited
(4.8
22.4
Setting
prohibited
(11.2
Conversion
Time
µ
µ
µ
µ
µ
s
s
µ
s
s
µ
s)
µ
Note 3
s
s
s)
µ
s or more and 100
FR2
0
1
1
1
0
0
1
0
FR1
0
0
1
0
1
0
1
1
FR0
0
0
0
1
0
1
1
1
µ
s or