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S3C94A5

8-BIT CMOS MICROCONTROLLER

Samsung 

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

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

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

Stop Control Register (STPCON) ..................................................................................................7-5

Chapter 8

RESET 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 1.........................................................................................................................................9-3

Port 2.........................................................................................................................................9-7

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

Port 4.........................................................................................................................................9-15

Port 5.........................................................................................................................................9-19

Chapter 10 Basic Timer

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

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

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

S3C94A5/F94A5 MICROCONTROLLER

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