HD64F2145 Datasheet, PDF (600/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

A block diagram of the A/D converter is shown in figure 21.1.
Module data bus
Internal data bus
AVCC
AVref
AVSS
10-bit D/A
A AAA
D DDD
D DDD
R RRR
A B CD
AA
DD
CC
SR
R
AN0
AN1
AN2
AN3
AN4
AN5
AN6/CIN0 to CIN7
AN7/CIN8 to CIN15
+
Comparator
Sample-and-hold
circuit
Control circuit
ø/8
ø/16
ADI interrupt signal
Conversion start trigger from 8-bit timer
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 21.1 Block Diagram of A/D Converter
Rev. 2.0, 08/02, page 560 of 788