User Manual

EP7309/11/12 User’s Manual - DS508UM4 1-1

Chapter 1

1Introduction

Overview

This chapter describes the EP73xx ARM processor, memory map, registers, and

signals. See the data sheet that is associated with a specific EP73xx device for more

informationaboutpinassignmentsforthatproduct.

Processor

The EP73xx incorporates an ARM 32-bit R ISC micro controller that controls a wide

range of on-chip peripherals. The ARM720T includes a a 8 Kbytes unified cache and a

MMU compatible with operating systems like Windows

CE and Linux

See the ARM 720T Technical Reference Manual, as cited on page 1-12.

Peripherals

On-chip EP73xx peripherals are product-specific for each chip. The superset of

available features includes:

• 48 Kbytes of on-chip SRAM that can be shared b etween the LCD controller

and general application use

• Memory interfaces (chip selects) for up to six independent 256 Mbyte

expansion segments with p rogrammable width and wait states

• 27 general purpose Input/Ou tputs.

• Digital Audio Interface (DAI) to interface with CD-quality DACs and

CODECs

• Interrupt Controller

• Advanced s ystem state controller and power management

• Two full-duplex 16550 A comp atible UARTs with 16-byte transmit and

receive FIFOs.

• IrDA SIR protocol controller capable of speeds up to 115.2 kb ps

• Programmable LCD controller for 1,2 or 4-bit-per-pixel with 16-level

grayscaler and fram e buffer start address.

• On-chip boot ROM programmed for serial port dow nload of b oot code.