User's Manual

S3C2450X RISC MICROPROCESSOR iii
Table of Contents
Chapter 1 Product Overview
1 Introduction ............................................................................................................................................... 1-1
2 Features ....................................................................................................................................................1-2
3 Block Diagram...........................................................................................................................................1-5
4 Pin Assignments ....................................................................................................................................... 1-6
4.1 Signal Descriptions.......................................................................................................................... 1-24
4.2 S3C2450 Operation Mode Description ...........................................................................................1-31
4.3 S3C2450 Memory MAP and Base Address of Special Registers................................................... 1-32
Chapter 2 System Controller
1 Overview ................................................................................................................................................... 2-1
2 Feature...................................................................................................................................................... 2-1
3 Block Diagram...........................................................................................................................................2-2
4 Functional Descriptions............................................................................................................................. 2-3
4.1 Reset Management and Types .......................................................................................................2-3
4.2 Hardware Reset............................................................................................................................... 2-3
4.3 Watchdog Reset .............................................................................................................................. 2-4
4.4 Software Reset ................................................................................................................................2-5
4.5 Wakeup Reset ................................................................................................................................. 2-5
5 Clock Management ...................................................................................................................................2-6
5.1 Clock Generation Overview............................................................................................................. 2-6
5.2 Clock Source Selection ................................................................................................................... 2-6
5.3 PLL (Phase-Locked-Loop) .............................................................................................................. 2-8
5.4 Change PLL Settings In Normal Operation..................................................................................... 2-8
5.5 System Clock Control ......................................................................................................................2-9
5.6 ARM & BUS Clock Divide Ratio ...................................................................................................... 2-10
5.7 Examples for configuring clock regiter to produce specific frequency of AMBA clocks.................. 2-11
5.8 ESYSCLK Control ...........................................................................................................................2-12
6 Power Management..................................................................................................................................2-13
6.1 Power Mode State Diagram ............................................................................................................2-13
6.2 Power Saving Modes....................................................................................................................... 2-14
6.3 Wake-Up Event
...............................................................................................................................
2-19
6.4 Output Port State and STOP and SLEEP Mode ............................................................................. 2-19
6.5 Power Saving Mode Entering/Exiting Condition.............................................................................. 2-20
7 Register Descriptions................................................................................................................................ 2-21
7.1 Address Map ...................................................................................................................................2-21