Hitachi H8S/2633 Hardware Manual page 1130

C.3 Port 4 Block Diagram
P4n
Legend
RPOR4 : Read port 4
n= 0 to 5
P4n
Legend
RPOR4 : Read port 4
n= 6 or 7
Figure C-3 (b) Port 4 Block Diagram (Pins P46 and P47)
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Figure C-3 (a) Port 4 Block Diagram (Pins P40 to P45)
RPOR4
RPOR4
A/D converter module
Analog input
A/D converter module
Analog input
D/A converter module
Output enable
Analog output