Samsung S3C80A5B User Manual page 10

Chapter 7
Overview............................................................................................................................................................................................7-1
System Clock Circuit.........................................................................................................................................................7-1
Clock Status During Power-Down Modes....................................................................................................................7-2
System Clock Control Register (CLKCON).................................................................................................................7-3
Chapter 8
System Reset .................................................................................................................................................................................8-1
lvd reset ..................................................................................................................................................................................8-1
Interrupt With Reset(INTR) ...............................................................................................................................................8-2
Watchdog Timer Reset......................................................................................................................................................8-2
Power-on Reset(POR) .......................................................................................................................................................8-2
System Reset Operation ..................................................................................................................................................8-3
Hardware Reset Values.....................................................................................................................................................8-4
Power-Down Modes ......................................................................................................................................................................8-6
Stop Mode.............................................................................................................................................................................8-6
Using POR to Release Stop Mode................................................................................................................................8-6
Using an INTR to Release Stop Mode..........................................................................................................................8-6
Idle Mode ...............................................................................................................................................................................8-9
Summary Table of Stop Mode, and Idle Mode...........................................................................................................8-10
Chapter 9
Overview............................................................................................................................................................................................9-1
Port Data Registers ............................................................................................................................................................9-2
Pull-Up Resistor Enable Registers ................................................................................................................................9-2
Port 0......................................................................................................................................................................................9-3
Port 0 Interrupt Enable Register (P0INT)......................................................................................................................9-4
Port 0 Interrupt Pending Register (P0PND).................................................................................................................9-4
Port 1......................................................................................................................................................................................9-6
Port 2......................................................................................................................................................................................9-8
Chapter 10
Module Overview.............................................................................................................................................................................10-1
Basic Timer Control Register (BTCON)........................................................................................................................10-1
Basic Timer Function Description..................................................................................................................................10-3
Timer 0 Control Register (T0CON) .................................................................................................................................10-3
Timer 0 Function Description...........................................................................................................................................10-5
S3C80A5B MICROCONTROLLER
Table of Contents
Part II Hardware Descriptions
Clock Circuit
RESET and Power-Down
I/O Ports
Basic Timer and Timer 0
(Continued)
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