
65
3819 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
FFFD
16
FFFB
16
FFF9
16
FFF7
16
FFF5
16
FFF3
16
FFF1
16
FFEF
16
FFED
16
FFEB
16
FFE9
16
FFE7
16
FFE5
16
FFE3
16
FFE1
16
FFDF
16
FFDD
16
Priority
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
Remarks
Non-maskable
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
Valid when interrupt interval determination
operates
Valid when serial I/O ordinary mode is
selected
Valid when serial I/O automatic transfer
mode is selected
Valid when serial I/O 2 is selected
Valid when serial I/O 3 is selected
STP release timer underflow
External interrupt
(active edge selectable)
Valid when INT
4
interrupt is selected
External interrupt
(active edge selectable)
Valid when A-D converter interrupt is selected
Valid when FLD blanking interrupt is
selected
Valid when FLD digit interrupt is selected
Non-maskable software interrupt
Functional description supplement
Interrupt
3819 group permits interrupts on the basis of 20 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 interrupt priority, refer to
“Table 5.”
Table 5. Interrupt sources, vector addresses and interrupt priority
FFFC
16
FFFA
16
FFF8
16
FFF6
16
FFF4
16
FFF2
16
FFF0
16
FFEE
16
FFEC
16
FFEA
16
FFE8
16
FFE6
16
FFE4
16
FFE2
16
FFE0
16
FFDE
16
FFDC
16
Interrupt sources
Reset (Note)
INT
0
interrupt
INT
1
/ZCR interrupt
INT
2
interrupt
Remote control/counter overflow
interrupt
Serial I/O 1 interrupt
Serial I/O 1 automatic transfer interrupt
Serial I/O 2 interrupt
Serial I/O 3 interrupt
Timer 1 interrupt
Timer 2 interrupt
Timer 3 interrupt
Timer 4 interrupt
Timer 5 interrupt
Timer 6 interrupt
INT
3
interrupt
INT
4
interrupt
A-D conversion interrupt
FLD blanking interrupt
FLD digit interrupt
BRK instruction interrupt
Note :
Reset functions in the same way as an interrupt with the highest priority.
High-order Low-order
Vector addresses