Block Diagram - Hitachi H8S/2338 Series Hardware Manual

• Module stop mode can be set
 As the initial setting, A/D converter operation is halted. Register access is enabled by
exiting module stop mode.
14.1.2

Block Diagram

Figure 14-1 shows a block diagram of the A/D converter.
AV
CC
10-bit A/D
V
ref
AV
SS
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AN12
AN13
AN14
AN15
ADTRG
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
508
+
–
Comparator
Sample-and-
hold circuit
Figure 14-1 Block Diagram of A/D Converter
Module data bus
A A A A
D D D D
D D D D
R R R R
A B C D
Control circuit
Internal data bus
A A
D D
C C
S R
R
ADI interrupt
signal
Conversion start
trigger from 8-bit
timer or TPU