HD64F2149 Datasheet, PDF (664/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

20.1.2 Block Diagram
Figure 20.1 shows a block diagram of the A/D converter.
Module data bus
AVCC
AVref
AVSS
10-bit D/A
Internal
data bus
AN0
AN1
AN2
AN3
AN4
AN5
AN6/CIN0 to CIN7
AN7/CIN8 to CIN15
+
–
Comparator
Sample-and-
hold circuit
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
Control circuit
ø/8
ø/16
ADI interrupt
signal
Conversion start
trigger from 8-bit
timer
Figure 20.1 Block Diagram of A/D Converter
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