Samsung 8-Bit Uživatelský manuál stáhnout pdf (Strana 8)

S3C9228/P9228 MICROCONTROLLERS vii

Table of Contents (Continued)

Part II — Hardware Descriptions

Chapter 7 Clock Circuit

Overview................................................................................................................................................. 7-1

System Clock Circuit .......................................................................................................................7-1

CPU Clock Notation ........................................................................................................................7-1

Main Oscillator Circuits.................................................................................................................... 7-2

Sub Oscillator Circuits..................................................................................................................... 7-2

Clock Status During Power-Down Modes.........................................................................................7-3

System Clock Control Register (CLKCON) ......................................................................................7-4

Oscillator Control Register (OSCCON)............................................................................................ 7-5

Switching The CPU Clock................................................................................................................7-6

Stop Control Register (STPCON) ....................................................................................................7-7

Chapter 8 RESETRESET and Power-Down

System Reset .......................................................................................................................................... 8-1

Overview.........................................................................................................................................8-1

Power-Down Modes.................................................................................................................................8-2

Stop Mode.......................................................................................................................................8-2

Idle Mode ........................................................................................................................................ 8-3

Hardware Reset Values................................................................................................................... 8-4

Chapter 9 I/O Ports

Overview................................................................................................................................................. 9-1

Port Data Registers ......................................................................................................................... 9-2

Port 0 .............................................................................................................................................. 9-3

Port 1 .............................................................................................................................................. 9-6

Port 2 .............................................................................................................................................. 9-9

Port 3 .............................................................................................................................................. 9-11

Port 4 .............................................................................................................................................. 9-14

Port 5 .............................................................................................................................................. 9-15

Port 6 .............................................................................................................................................. 9-16

Chapter 10 Basic Timer

Overview................................................................................................................................................. 10-1

Basic Timer Control Register (BTCON) ........................................................................................... 10-2

Basic Timer Function Description ....................................................................................................10-3