
EP7309/11/12 User’s Manual - DS508UM4 iii
Copyright Cirrus Logic, Inc. 2003
1Contents
Table of Contents
Chapter 1. Introduction
Overview............................................................................................................................................................ 1-1
Processor.....................................................................................................................................................1-1
Peripherals.................................................................................................................................................. 1-1
Memory Map and Register List...............................................................................................................1-2
Pin Description........................................................................................................................................... 1-6
Block Diagrams ............................................................................................................................................... 1-11
References .................................................................................................................................................1-12
Chapter 2. CPU Core
Introduction....................................................................................................................................................... 2-1
Features .............................................................................................................................................................. 2-1
Programming Register List..............................................................................................................................2-1
Block Diagram...................................................................................................................................................2-2
Programming Examples ..................................................................................................................................2-2
Operational Overview...................................................................................................................................... 2-4
MMU............................................................................................................................................................ 2-4
TLB...............................................................................................................................................................2-5
Cache ........................................................................................................................................................... 2-5
Write Buffer ................................................................................................................................................ 2-6
Debug Interface.......................................................................................................................................... 2-7
CPU Register Definitions................................................................................................................................. 2-7
ARM720T Core Coprocessor Registers................................................................................................... 2-8
CPU Clocks................................................................................................................................................. 2-9
PLL Multiplier Write Register (PLLW) .............................................................................................. 2-11
PLL Multiplier Read Register (PLLR)............................................................................................... 2-11
CPU State Control.................................................................................................................................... 2-12
State Control Register Descriptions .............................................................................................................2-13
Enter the Standby State Register (STDBY)..................................................................................... 2-13
Enter the Idle State Register (HALT) ............................................................................................... 2-14
Power Up Sequence................................................................................................................................. 2-14
RESET........................................................................................................................................................2-15
Chapter 3. Timers
Introduction....................................................................................................................................................... 3-1
Features .............................................................................................................................................................. 3-1
Timer Register List............................................................................................................................................ 3-1
Programming Example....................................................................................................................................3-1
Operational Overview...................................................................................................................................... 3-2
Free Running Mode................................................................................................................................... 3-2
Prescale Mode ............................................................................................................................................ 3-3
RTC Timer...................................................................................................................................................3-3
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