IA186EM/IA188EM
Data Sheet
8-Bit/16-Bit Microcontrollers
February 25, 2011
4.16.1 Interrupt Types
Table 14 presents interrupt names, types, vector table address, End-of-Interrupt (EOI) type,
overall priority, and related instructions.
Table 14. Interrupt Types
Interrupt Vector Table
Overall
Priority
1
1A
1B
1
Related
Instructions
DIV, IDIV
All
Interrupt Name
Type
00h
01h
02h
03h
04h
05h
06h
Address
EOI Type
NA
a
00h
Divide Error Exception
b
04h
NA
Trace Interrupt
Non-maskable Interrupt (NMI)
08h
0ch
NA
NA
–
a
INT3
INT0
BOUND
Breakpoint Interrupt
a
10h
NA
1
INT0 Detected Overflow Exception
a
14h
NA
1
Array Bounds Exception
a
18h
NA
1
Undefined
Opcodes
Unused Opcode Exception
a,c
07h
1ch
NA
1
ESC
Opcodes
ESC Opcode Exception
d,e
08h
12h
20h
48h
08h
08h
08h
–
2A
2B
2C
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Timer 0 Interrupt
d,e
Timer 1 Interrupt
d,e
13h
4ch
Timer 2 Interrupt
Reserved
09h
0ah
24h
28h
e
0ah
0bh
0ch
0dh
0eh
0fh
10h
11h
14h
–
3
DMA 0 Interrupt
e
0bh
2ch
4
DMA 1 Interrupt
INT0 Interrupt
INT1 Interrupt
INT2 Interrupt
INT3 Interrupt
0ch
0dh
0eh
0fh
30h
34h
38h
3ch
5
6
7
8
f
10h
40h
9
INT4 Interrupt
f
11h
44h
9
Watchdog Timer Interrupt
f
14h
50h
9
Asynchronous Serial Port Interrupt
Reserved
15h–1fh
54h–7ch
–
Note: If the priority levels are not changed, the default priority level will be used for the interrupt sources.
a
Instruction execution generates interrupts.
b
Performed in the same manner as for the 8086 and 8088.
c
An ESC opcode causes a trap.
d
Because only one IRQ is generated for the three timers, they share priority level with other sources. The
timers have an interrupt priority order among themselves (2A > 2B > 2C).
e
These interrupt types are programmable in slave mode.
f
Not available in slave mode.
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