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A/D CONVERTER
BLOCK DIAGRAM
(Select one input pin of the assigned pins)
Input Pins
ADC0-ADC7
(P2.0-P2.7)
ADCEN.0-.7
(Assign Pins to ADC Input)
15-4
ADCON.4-.6
ADCON.0
(AD/C Enable)
M
U
. .
.
X
ADCON.0
(AD/C Enable)
Figure 15-3. A/D Converter Functional Block Diagram
Analog
-
Comparator
+
AV
REF
10-bit D/A
Converter
AV
SS
S3C8248/C8245/P8245/C8247/C8249/P8249
ADCON.2-.1
Clock
Selector
Successive
Approximation
Logic & Register
Upper 8-bit is loaded to
A/D Conversion
Data Register
Conversion
Result (ADDATAH/L
F8, F9H, Set 1, Bank 1)
To ADCON.3
(EOC Flag)
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