
7902 Group User’s Manual
INTERRUPTS
7-4
Remarks
Non-maskable
Non-maskable software interrupt
Do not use.
Non-maskable internal interrupt
Non-maskable external interrupt
Maskable external interrupts
Maskable internal interrupts
Maskable internal interrupt
Maskable external interrupts
Do not use.
Non-maskable software interrupt
Do not use.
7.2 Interrupt sources
Table 7.2.1 lists the interrupt sources and the interrupt vector addresses. When programming, set the start
address of each interrupt routine to the vector addresses listed in this table.
7.2 Interrupt sources
Low-order
address
FFFE16
FFFC16
FFFA16
FFF816
FFF616
FFF416
FFF216
FFF016
FFEE16
FFEC16
FFEA16
FFE816
FFE616
FFE416
FFE216
FFE016
FFDE16
FFDC16
FFDA16
FFD816
FFD616
FFD416
FFD216
FFD016
FFCE16
FFCC16
FFCA16
FFC816
FFC616
FFC416
FFC216
FFC016
Interrupt vector addresses
Table 7.2.1 Interrupt sources and interrupt vector addresses
High-order
address
FFFF16
FFFD16
FFFB16
FFF916
FFF716
FFF516
FFF316
FFF116
FFEF16
FFED16
FFEB16
FFE916
FFE716
FFE516
FFE316
FFE116
FFDF16
FFDD16
FFDB16
FFD916
FFD716
FFD516
FFD316
FFD116
FFCF16
FFCD16
FFCB16
FFC916
FFC716
FFC516
FFC316
FFC116
Interrupt source
Reset
Zero division
BRK instruction (Note)
____
DBC (Note)
Watchdog timer
____
NMI
____
INT0
____
INT1
____
INT2
Timer A0
Timer A1
Timer A2
Timer A3
Timer A4
Timer B0
Timer B1
Timer B2
UART0 receive
UART0 transmit
UART1 receive
UART1 transmit
A-D conversion
____
INT3
____
INT4
Reserved area
Address matching detection
Reserved area
____
Note: The BRK instruction and the DBC interrupt are used exclusively for a debugger.
q Maskable interrupt: An interrupt of which request’s acceptance can be disabled by software.
____
q Non-maskable interrupt (including zero division, watchdog timer, NMI, and address matching detection
interrupts):
An interrupt which is certain to be accepted when its request occurs. These interrupts do not have their
interrupt control registers and are not affected by the interrupt disable flag (I).
Reference
4. RESET
7900 Series Software Manual
15. WATCHDOG TIMER
7.10 External interrupts
9. TIMER A
10. TIMER B
12. SERIAL I/O
13. A-D CONVERTER
7.10 External interrupts
18. DEBUG FUNCTION