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Chapter 19
(4)
(a) Timing example
ANI0
ANI1
ANI2
ANI3
A/D
conversion
ADA0CRn
INTAD
(b) Block diagram
Figure 19-7
686
One-shot scan mode
In this mode, analog input pins are sequentially selected, from the ANI0 pin to
the pin specified by the ADAnS register, and their values are converted into
digital values. The result of each conversion is stored in the ADAnCRm register
corresponding to the analog input pin. When conversion of the analog input pin
specified by the ADAnS register is complete, the A/D conversion end interrupt
request signal (INTAD) is generated, and A/D conversion is stopped.(n = 0-23).
Data
1
Data
Data 1
Data 2
(ANI0)
(
ANI1)
Data 1
(
ANI0)
Conversion start
Set ADA0CE bit = 1
Analog input pin
ANI0
ANI1
ANI2
ANI3
ANI4
ANI5
.
.
.
.
ANIm
Timing example of one-shot scan mode operation
(ADA0S Register = 03H)
User's Manual U18743EE1V2UM00
Data
2
Data
3
Data
4
Data 3
Data 4
Data 1
(
ANI2)
(
ANI3)
(ANI0)
Data 2
Data 3
Data 4
(ANI1)
(
ANI2)
(
ANI3)
Transformation
completion
ADA0CRn
A/D converter
A/D Converter (ADC)
5
Data
6
Data
7
Data 2
Data 3
(ANI1)
(ANI2)
Data 1
Data 2
Data 3
(ANI0)
(ANI1)
(ANI2)
register
ADA0CR0
ADA0CR1
ADA0CR2
ADA0CR3
ADA0CR4
ADA0CR5
.
.
.
ADA0CRm
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