Datasheet

Rev.6.00 Oct.28.2004 page 555 of 1016
REJ09B0138-0600H
Section 17 D/A Converter
17.1 Overview
The H8S/2357 Group includes a two-channel D/A converter.
17.1.1 Features
D/A converter features are listed below
• 8-bit resolution
• Two output channels
• Maximum conversion time of 10 µs (with 20 pF load)
• Output voltage of 0 V to V
ref
• D/A output hold function in software standby mode
• Module stop mode can be set
 As the initial setting, D/A converter operation is halted. Register access is enabled by exiting module stop mode.
17.1.2 Block Diagram
Figure 17-1 shows a block diagram of the D/A converter.
Module data bus Internal data bus
V
ref
AV
CC
DA1
DA0
AV
SS
8-bit
D/A
Control circuit
DADR0
Bus interface
DADR1
DACR
Legend:
DACR: D/A control register
DADR0,1: D/A data register 0, 1
Figure 17-1 Block Diagram of D/A Converter