User Manual

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