
S3C880A/F880A MICROCONTROLLER
vii
Table of Contents
(Continued)
Part II Hardware Descriptions
Chapter 7
Clock Circuit
Overview.............................................................................................................................................7-1
System Clock Circuit...................................................................................................................7-1
Clock Status During Power-Down Modes.......................................................................................7-2
System Clock Control Register (CLKCON).....................................................................................7-3
Relation Between L-C Oscillator and CPU Clock ............................................................................7-5
Chapter 8
nRESET and Power-Down
System Reset.....................................................................................................................................8-1
Overview.....................................................................................................................................8-1
Hardware Reset Values................................................................................................................8-2
Power-Down Modes.............................................................................................................................8-5
Stop Mode..................................................................................................................................8-5
Idle Mode....................................................................................................................................8-6
Chapter 9
I/O Ports
Overview.............................................................................................................................................9-1
Port Data Registers .....................................................................................................................9-2
Port 0.........................................................................................................................................9-2
Port 1.........................................................................................................................................9-4
Port 2.........................................................................................................................................9-5
Port 3.........................................................................................................................................9-6
Chapter 10
Basic Timer and Timer 0
Module Overview..................................................................................................................................10-1
Basic Timer Control Register (BTCON)..........................................................................................10-2
Basic Timer Function Description..................................................................................................10-3
Timer 0 Control Register (T0CON).................................................................................................10-6
Timer 0 Function Description........................................................................................................10-7