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Chapter 11
A/D Converter
User’s Manual U16702EE3V2UD00
Figure 11-2:
A/D Conversion Result Register n
(ADA0CRn, ADA0CRDD, ADA0CRSS) Format (2/2)
(b) After RESET: ADA0CRDD, ADA0CRSS = 0000H, Read only registers
The relationship between the analog voltage input to an analog input pin (ANI0 to ANI15) and the value
of the A/D conversion result register (ADA0CRn) is as follows (n = 0 to 15):
or,
INT ( ):
Function that returns integer of value in ( )
V
IN
:
Analog input voltage
AV
REF0
:
AV
REF0
pin voltage
ADA0CR: Value of A/D conversion result register (ADA0CRn)
Symbol
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Address
ADA0CRDD
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF240H
ADA0CRSS
0
0
0
0
0
0
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0 FFFFF242H
ADA0CR = INT( × 1,024 + 0.5)
V
IN
AV
REF0
(ADA0CR - 0.5) ×
≤
V
IN
< 0.5) ×
AV
REF0
1024
AV
REF0
1024
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