Panasonic MN103001G/F01K - Manual (Page 372)

I/O Ports
15-6
15.2 Port 0
15.2.1 Block Diagram
Fig. 15-2-1 and Fig 15-2-2 show block diagrams for port 0.
Fig. 15-2-1 Port 0 Block Diagram (P02)
Internal data bus
P02
P0OUT
P02O
P... Represents one bit of each register.
M
P
X
CAS
A22
M
P
X
P02MD
P0MD
P02S
P0SS
A23 to A16
Output enable signals
Output
control
Control signal
from BC