m3819 Renesas Electronics Corporation., m3819 Datasheet - Page 79

• Manufacturer Part Number: m3819
• Description: Mitsubishi 8-bit Single-chip Microcomputer 740 Family / 38000 Series
• Manufacturer: Renesas Electronics Corporation.

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
Note : Reset functions in the same way as an interrupt with the highest priority.
Priority
10
11
12
13
14
15
16
17
1
2
3
4
5
6
7
8
9
Reset (Note)
INT
INT
INT
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
INT
A-D conversion interrupt
FLD blanking interrupt
FLD digit interrupt
BRK instruction interrupt
0
1
2
3
4
/ZCR interrupt
interrupt
interrupt
interrupt
interrupt
Interrupt sources
High-order Low-order
FFDD
FFFD
FFED
FFEB
FFDF
FFFB
FFF9
FFF7
FFF5
FFF3
FFF1
FFEF
FFE9
FFE7
FFE5
FFE3
FFE1
Vector addresses
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
FFDC
FFFC
FFFA
FFEE
FFEC
FFEA
FFDE
FFF8
FFF6
FFF4
FFF2
FFF0
FFE8
FFE6
FFE4
FFE2
FFE0
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
16
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Non-maskable
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
Valid when interrupt interval determination
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
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
operates
MITSUBISHI MICROCOMPUTERS
4
interrupt is selected
Remarks
3819 Group
65