Hitachi H8S/2633 Hardware Manual page 1156

C.12 Port G Block Diagram
PG0
Legend
WDDRG
WDRG
RDRG
RPORG
1144
: Write to PGDDR
: Write to PGDR
: Read PGDR
: Read port G
Figure C-12 (a) Port G Block Diagram (Pin PG0)
Mode 4/5/6
Reset
R
Q D
PG0DDR
C
WDDRG
Reset
R
Q D
PG0DR
C
WDRG
Bus controller
CAS enable
CAS output
RDRG
RPORG
IRQ interrupt input