Intel 386 User Manual

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.
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e
r
n
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B
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1
0
A2393-01
P n DIR. x
P n LTC. x
P n PIN. x
Internal Peripherals
P n CFG. x
P n . x

Intel 386 Specifications

General

Architecture	x86
Clock Speed	12 MHz to 40 MHz
Transistor Count	275, 000
Data Bus Width	32-bit
Address Bus Width	32-bit
Instruction Set	x86
Introduced	1985
Maximum Memory	4 GB
Operating Modes	Real mode, Protected mode, Virtual 8086 mode
MMU	Yes
Voltage	5V
Model	Intel 386
Package	PGA
Process	1.5 μm to 1 μm