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Overview ....................................................................................................................................................5-1
Interrupt Types ...................................................................................................................................5-2
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
Overview ....................................................................................................................................................6-1
Flags Register (FLAGS).....................................................................................................................6-6
Flag Descriptions ...............................................................................................................................6-7
Instruction Set Notation......................................................................................................................6-8
Condition Codes.................................................................................................................................6-12
Instruction Descriptions ......................................................................................................................6-13
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
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Table of Contents
Clock Circuit
(Continued)
S3F80JB MICROCONTROLLER
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