Chapter 5 device configuration, 1 introduction – Intel 386 User Manual
Page 74
5-1
CHAPTER 5
DEVICE CONFIGURATION
The Intel386™ EX processor provides many possible signal to pin connections as well as periph-
eral to peripheral connections. This chapter describes the available configurations and how to
configure them.
This chapter is organized as follows:
•
•
Peripheral Configuration (page 5-3)
•
•
Device Configuration Procedure (page 5-28)
•
Configuration Example (page 5-28)
5.1
INTRODUCTION
Device configuration is the process of setting up the microprocessor’s on-chip peripherals
†
for a
particular system design. Specifically, device configuration consists of programming registers to
connect peripheral signals to the package pins and interconnect the peripherals. The peripherals
include the following:
•
DMA Controller (DMA)
•
Interrupt Control Unit (ICU)
•
Timer/counter Unit (TCU)
•
Asynchronous Serial I/O Units (SIO0, SIO1)
•
Synchronous Serial I/O Unit (SSIO)
•
Refresh Control Unit (RCU)
•
Chip-select Unit (CSU)
•
Watchdog Timer Unit (WDT)
In addition, the pin configuration registers control connections from the coprocessor to the core
and pin connections to the bus arbiter.
†
In this chapter, the terms “peripheral” and “on-chip peripheral” are used interchangeably. An “off-chip peripheral” is
external to the Intel386 EX processor.