![](http://datasheet.mmic.net.cn/30000/M38027E8SP_datasheet_2360095/M38027E8SP_54.png)
HARDWARE
1-39
3802 GROUP USER’S MANUAL
FUNCTIONAL DESCRIPTION SUPPLEMENT
Interrupt
3802 group permits interrupts on the basis of 16
sources. It is vector interrupts with a fixed priority
system. Accordingly, when two or more interrupt
requests occur during the same sampling, the higher-
priority interrupt is accepted first. This priority is
determined by hardware, but variety of priority
processing can be performed by software, using an
interrupt enable bit and an interrupt disable flag.
For interrupt sources, vector addresses and inter-
rupt priority, refer to “Table 10.”
Vector addresses
FFFD16
FFFB16
FFF916
FFF716
FFF516
FFF316
FFF116
FFEF16
FFED16
FFEB16
FFE916
FFE716
FFE516
FFE316
FFE116
FFDF16
FFDD16
FFFC16
FFFA16
FFF816
FFF616
FFF416
FFF216
FFF016
FFEE16
FFEC16
FFEA16
FFE816
FFE616
FFE416
FFE216
FFE016
FFDE16
FFDC16
Table 10. Interrupt sources, vector addresses and interrupt priority
Remarks
Non-maskable
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
Valid when serial I/O1 is selected
STP release timer underflow
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
Valid when serial I/O2 is selected
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
Non-maskable software interrupt
High-order Low-order
Note: Reset functions in the same way as an interrupt with the highest priority.
Interrupt sources
Reset (Note)
INT0 interrupt
INT1 interrupt
Serial I/O1 receive interrupt
Serial I/O1 transmit interrupt
Timer X interrupt
Timer Y interrupt
Timer 1 interrupt
Timer 2 interrupt
CNTR0 interrupt
CNTR1 interrupt
Serial I/O2 interrupt
INT2 interrupt
INT3 interrupt
INT4 interrupt
A-D conversion interrupt
BRK instruction interrupt
Priority
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
FUNCTIONAL DESCRIPTION SUPPLEMENT