Panasonic MN103001G/F01K - Manual (Page 396)

I/O Ports
15-30
Fig. 15-7-2 Port 5 Block Diagram (P54)
Internal data bus
P5OUT
P54O
TM12IO
M
P
X
P54
M
P
X
P... Represents one bit of each register.
P54I
P5IN
TM12IO/TM4IO/SBI3
TM4IO
P5DIR
P54D
M
P
X
P54M
P5MD
P54S
P5SS