Intel 386 - Manual (Page 481)

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
16-2
Figure 16-1. I/O Port Block Diagram
16.1.1 Port Functionality
The function of a bi-directional port pin is controlled by the state of the Port Control Latch (Pn-
LTC). This is shown in Figure 16-2.
I
n
t
e
r
n
a
l
B
u
s
1
0
A2393-01
P nDIR.x
P nLTC.x
P nPIN.x
Internal Peripherals
P nCFG.x
P n.x