I/O Ports
15-23
Fig. 15-6-2 Port 4 Block Diagram (P44)
Internal data bus
P44
P4OUT
P44I
P4IN
P44M
P4MD
P4DIR
P44D
P44O
P... Represents one bit of each register.
P44S
P4SS
M
P
X
M
P
X
DCAS1
SBI1
M
P
X
Control
signal from
BC