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65
3819 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
FFFD16
FFFB16
FFF916
FFF716
FFF516
FFF316
FFF116
FFEF16
FFED16
FFEB16
FFE916
FFE716
FFE516
FFE316
FFE116
FFDF16
FFDD16
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 INT4 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
FFFC16
FFFA16
FFF816
FFF616
FFF416
FFF216
FFF016
FFEE16
FFEC16
FFEA16
FFE816
FFE616
FFE416
FFE216
FFE016
FFDE16
FFDC16
Interrupt sources
Reset (Note)
INT0 interrupt
INT1/ZCR interrupt
INT2 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
INT3 interrupt
INT4 interrupt
A-D conversion interrupt
FLD blanking interrupt
FLD digit interrupt
BRK instruction interrupt
High-order Low-order
Vector addresses
Note : Reset functions in the same way as an interrupt with the highest priority.