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(2) A/D scan mode registers 01 and 11 (ADSCM01, ADSCM11)
The ADSCMn1 registers are 16-bit registers that set the conversion time of the A/D converter.
The ADSCMn1 register can be read/written in 16-bit units.
When the higher 8 bits of the ADSCMn1 register are used as the ADSCMn1H register, and the lower 8 bits
are used as the ADSCMn1L register, the ADSCMn1H register can be read/written in 8-bit or 1-bit units, and
the ADSCMn1L register is read-only in 8-bit units.
Caution Do not write to the ADSCMn1 registers during A/D conversion operation. If a write is
performed, conversion operation is suspended and subsequently terminates.
15
14
13
ADSCM01
0
0
0
15
14
13
ADSCM11
0
0
0
Bit Position
Bit Name
10 to 8
FR2 to
FR0
652
CHAPTER 13 A/D CONVERTER
12
11
10
9
8
7
0
0
FR2
FR1
FR0
0
12
11
10
9
8
7
0
0
FR2
FR1
FR0
0
Specifies conversion time.
FR2
FR1
FR0
Conversion Clocks
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Setting prohibited
Note This is the time from sampling until conversion termination.
Sampling time = (Conversion clocks − 8)/6 × f
Caution Be sure to secure the conversion time within a range of 5 to 10 µ µ µ µ s.
Conversion time = f
Remark f
: Internal system clock
XX
User's Manual U14492EJ3V0UD
6
5
4
3
2
1
0
0
0
0
0
0
6
5
4
3
2
1
0
0
0
0
0
0
Function
Conversion Time ( µ s)
f
= 50 MHz
XX
344
6.88
−
248
−
176
−
128
−
104
−
80
−
56
−
XX
× × × × Conversion clocks
XX
0
Address
Initial value
0
FFFFF202H
0000H
0
Address
Initial value
0
FFFFF242H
0000H
Note
f
= 40 MHz
f
= 33 MHz
XX
XX
−
8.60
6.20
7.51
−
5.33
−
−
−
−
−
−
−
−
−
−
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