Table of Contents
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Chapter 4
Overview .............................................................................................................................................4-1
Chapter 5
Overview ............................................................................................................................................................................................5-1
Interrupt Types......................................................................................................................................................................5-2
S3C80A5B Interrupt Structure.........................................................................................................................................5-3
Interrupt Vector Addresses...............................................................................................................................................5-5
Enable/Disable Interrupt Instructions (EI, DI)..............................................................................................................5-7
System-Level Interrupt Control Registers.....................................................................................................................5-7
Interrupt Processing Control Points...............................................................................................................................5-8
Peripheral Interrupt Control Registers ...........................................................................................................................5-9
System Mode Register (SYM) ........................................................................................................................................5-10
Interrupt Mask Register (IMR)..........................................................................................................................................5-11
Interrupt Priority Register (IPR) .......................................................................................................................................5-12
Interrupt Request Register (IRQ).....................................................................................................................................5-14
Interrupt Pending Function Types...................................................................................................................................5-15
Interrupt Source Polling Sequence.................................................................................................................................5-16
Interrupt Service Routines .................................................................................................................................................5-16
Generating interrupt Vector Addresses ........................................................................................................................5-17
Nesting of Vectored Interrupts.........................................................................................................................................5-17
Instruction Pointer (IP).......................................................................................................................................................5-17
Fast Interrupt Processing..................................................................................................................................................5-17
Chapter 6
Overview ............................................................................................................................................................................................6-1
Data Types ............................................................................................................................................................................6-1
Register Addressing ...........................................................................................................................................................6-1
Addressing Modes ..............................................................................................................................................................6-1
Flags Register (FLAGS)....................................................................................................................................................6-6
Flag Descriptions.................................................................................................................................................................6-7
Instruction Set Notation.....................................................................................................................................................6-8
Condition Codes...................................................................................................................................................................6-12
Instruction Descriptions .....................................................................................................................................................6-13
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Table of Contents
Control Registers
Interrupt Structure
Instruction Set
(Continued)
S3C80A5B MICROCONTROLLER
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