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Overview ....................................................................................................................................................... 3-1
Register Addressing Mode (R) ............................................................................................................... 3-2
Indirect Register Addressing Mode (IR) ................................................................................................. 3-3
Indexed Addressing Mode (X)................................................................................................................ 3-7
Direct Address Mode (DA) ..................................................................................................................... 3-10
Direct Address MODE (Continued) ........................................................................................................ 3-11
Indirect Address Mode (IA)..................................................................................................................... 3-12
Relative Address Mode (RA) .................................................................................................................. 3-13
Immediate Mode (IM) ............................................................................................................................. 3-14
Overview ....................................................................................................................................................... 4-1
Overview ....................................................................................................................................................... 5-1
Levels ..................................................................................................................................................... 5-1
Vectors.................................................................................................................................................... 5-1
Sources................................................................................................................................................... 5-1
Interrupt Types ....................................................................................................................................... 5-2
Interrupt Vector Addresses..................................................................................................................... 5-4
Enable/Disable Interrupt Instructions (EI, DI) ......................................................................................... 5-6
System-Level Interrupt Control Registers .............................................................................................. 5-6
Interrupt Processing Control Points........................................................................................................ 5-7
Peripheral Interrupt Control Registers.................................................................................................... 5-8
System Mode Register (SYM) ................................................................................................................ 5-9
Interrupt Mask Register (IMR) ................................................................................................................ 5-10
Interrupt Priority Register (IPR) .............................................................................................................. 5-11
Interrupt Request Register (IRQ) ........................................................................................................... 5-13
Interrupt Pending Function Types .......................................................................................................... 5-14
Overview................................................................................................................................................. 5-14
Pending Bits Cleared Automatically by Hardware.................................................................................. 5-14
Pending Bits Cleared by the Service Routine ........................................................................................ 5-14
Interrupt Source Polling Sequence......................................................................................................... 5-15
Interrupt Service Routines ...................................................................................................................... 5-15
Generating interrupt Vector Addresses .................................................................................................. 5-16
Nesting of Vectored Interrupts................................................................................................................ 5-16
Instruction Pointer (IP)............................................................................................................................ 5-16
Fast Interrupt Processing ....................................................................................................................... 5-16
Fast Interrupt Processing (Continued) ................................................................................................... 5-17
Procedure for Initiating Fast Interrupt..................................................................................................... 5-17
Fast Interrupt Service Routine................................................................................................................ 5-17
Programming Guidelines ........................................................................................................................ 5-17
S3F80P5_UM_REV1.00 MICROCONTROLLER
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