Intel 386

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
2-2
Figure 2-1. Intel386™ EX Embedded Processor Block Diagram
A2849-02
JTAG Unit
Clock and Power
Management Unit
DRAM Refresh
Control Unit
Watchdog Timer Unit
Bus Monitor
Asynchronous Serial I/O
2 channels
(16450 compatible)
Synchronous Serial I/O
1 channel, full duplex
Timer/counter Unit
3 channels
(82C54 compatible)
I/O Ports
Data
Address
Bus Interface
Unit
Intel386
™
CX Core

Core Enhancements
- A20 Gate
- CPU Reset
- SMM
Chip-select
Unit
Interrupt Control Unit
DMA Controller
2 channels
(8237A compatible)
and Bus Arbiter Unit
INTR
Address
Data