Renesas Renasas Single-Chip Microcomputer SH7086 Manual de usuario descargar pdf (Pagina 38)

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Chapter 1 Overview

1.10 Vector Table

1.10.2 Variable Vector Table

The variable vector table is an address-variable vector table. Specifically, this vector table is a 256-byte

interrupt vector table that uses the value indicated by the interrupt table register (INTB) as the entry

address (IntBase). Figure 1.10.2 shows a variable vector table.

The variable vector table is comprised of four bytes per table. Each vector table must contain the

interrupt handler routine’s entry address.

Each vector table has software interrupt numbers (0 to 63). The INT instruction uses these software

interrupt numbers.

Interrupts from the peripheral functions built in each M16C model are allocated to software interrupt

numbers 0 through 31.

b19 b0

INTB IntBase











IntBase+4

IntBase+8

IntBase+252











Vectors accommodat-

ing peripheral I/O

interrupts

Software interrupt

numbers

Figure 1.10.2 Variable vector table

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 307 308

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