15.1.2
Block Diagram
Figure 15.1 shows a block diagram of the A/D converter.
Internal
data bus
Module data bus
AVCC
AVSS
10-bit D/A
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
+
–
øp/8
Comparator
Analog
multi-
plexer
Control circuit
Sample-and-
hold circuit
øp/16
ADI
interrupt
signal
ADTRG
Legend:
ADCR: A/D control register
ADCSR: A/D control/status register
ADDRA: A/D data register A
ADDRB: A/D data register B
ADDRC: A/D data register C
ADDRD: A/D data register D
Figure 15.1 A/D Converter Block Diagram
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