Exception Vectors - Motorola MC68340 User Manual

5.5.1 Exception Vectors

An exception vector is the address of a routine that handles an exception. The VBR
contains the base address of a 1024-byte exception vector table, which consists of 256
exception vectors. Sixty-four vectors are defined by the processor, and 192 vectors are
reserved for user definition as interrupt vectors. Except for the reset vector which is two
long words, each vector in the table is one long word. Refer to Table 5-16 for information
on vector assignment.
Vector Number
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16–23
24
25
26
27
28
29
30
31
32–47
48–58
59–63
64–255
MOTOROLA
Freescale Semiconductor, Inc.
Table 5-16. Exception Vector Assignments
Vector Offset
Dec Hex Space
0 000
4 004
8 008
12 00C
16 010
20 014
24 018
28 01C
32 020
36 024
40 028
44 02C
48 030
52 034
56 038
60 03C
64 040
92 05C
96 060
100 064
104 068
108 06C
112 070
116 074
120 078
124 07C
128 080
188 0BC
192 0C0
232 0E8
236 0EC
252 0FC
256 100
1020 3FC
MC68340 USER'S MANUAL
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Assignment
SP Reset: Initial Stack Pointer
SP Reset: Initial Program Counter
SD Bus Error
SD Address Error
SD Illegal Instruction
SD Zero Division
SD CHK, CHK2 Instructions
SD TRAPcc, TRAPV Instructions
SD Privilege Violation
SD Trace
SD Line 1010 Emulator
SD Line 1111 Emulator
SD Hardware Breakpoint
SD (Reserved for Coprocessor Protocol Violation)
SD Format Error
SD Uninitialized Interrupt
SD (Unassigned, Reserved)
—
SD Spurious Interrupt
SD Level 1 Interrupt Autovector
SD Level 2 Interrupt Autovector
SD Level 3 Interrupt Autovector
SD Level 4 Interrupt Autovector
SD Level 5 Interrupt Autovector
SD Level 6 Interrupt Autovector
SD Level 7 Interrupt Autovector
SD Trap Instruction Vectors (0–15)
—
SD (Reserved for Coprocessor)
—
SD (Unassigned, Reserved)
—
SD User-Defined Vectors (192)
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