HD6433044 Datasheet, PDF (846/867 Pages) Hitachi Semiconductor – Hitachi Single-Chip Microcomputer

Reset
R
Q
D
P9 _n DDR
C
SCI
WP9D
Reset
Input enable
R
P9 _n
Q
D
P9_n DR
C
WP9
RP9
WP9D: Write to P9DDR
WP9: Write to port 9
RP9: Read port 9
n = 2 and 3
Figure C-9 (c) Port 9 Block Diagram (Pins P9₂, P9₃)
Serial receive
data
839