HD6433832S Datasheet, PDF (316/560 Pages) Renesas Technology Corp – single-chip microcomputers

Section 12 A/D Converter
12.1 Overview
The H8/3834 Series includes on-chip a resistance-ladder-based successive-approximation analog-
to-digital converter, and can convert up to 12 channels of analog input.
12.1.1 Features
The A/D converter has the following features.
• 8-bit resolution
• 12 input channels
• Conversion time: approx. 12.4 µs per channel (at 5 MHz operation)
• Built-in sample-and-hold function
• Interrupt requested on completion of A/D conversion
• A/D conversion can be started by external trigger input
12.1.2 Block Diagram
Figure 12.1 shows a block diagram of the A/D converter.
ADTRG
AN₀
AN₁
AN₂
AN₃
AN₄
AN₅
AN₆
AN₇
AN₈
AN₉
AN₁₀
AN₁₁
AV _CC
AV _SS
A/D mode
register
Multiplexer
Reference
voltage
AV _CC
+
Com-
parator
–
AV _SS
A/D start
register
Control logic
A/D result register
IRRAD
Figure 12.1 Block Diagram of the A/D Converter
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