M38002M4 Datasheet, PDF (47/173 Pages) Mitsubishi Electric Semiconductor – 8-BIT SINGLE-CHIP MICROCOMPUTER

HARDWARE
FUNCTIONAL DESCRIPTION SUPPLEMENT
FUNCTIONAL DESCRIPTION SUPPLEMENT
Interrupt
3800 group permits interrupts on the basis of 15 sources. It is vec-
tor 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 10.”
Table 10. Interrupt sources, vector addresses and interrupt priority
Priority
Interrupt sources
Vector addresses
High-order Low-order
Remarks
1
Reset (Note)
2
INT0 interrupt
FFFD16
FFFB16
FFFC16
FFFA16
3
INT1 interrupt
FFF916
FFF816
4
Serial I/O receive interrupt
5
Serial I/O transmit interrupt
6
Timer X interrupt
7
Timer Y interrupt
8
Timer 1 interrupt
9
Timer 2 interrupt
10 CNTR0 interrupt
FFF716
FFF516
FFF316
FFF116
FFEF16
FFED16
FFEB16
FFF616
FFF416
FFF216
FFF016
FFEE16
FFEC16
FFEA16
11 CNTR1 interrupt
FFE916
FFE816
12 INT2 interrupt
FFE716
FFE616
13 INT3 interrupt
FFE516
FFE416
14 INT4 interrupt
FFE316
FFE216
15 INT5 interrupt
FFE116
FFE016
16 BRK instruction interrupt
FFDD16
FFDC16
Note: Reset functions in the same way as an interrupt with the highest priority.
Non-maskable
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
Valid when serial I/O is selected
Valid when serial I/O is selected
STP release timer underflow
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
External interrupt
(active edge selectable)
Non-maskable software interrupt
3800 GROUP USER’S MANUAL
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