7480_M Datasheet, PDF (58/337 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES

HARDWARE
1.11 Interrupts
1.11 Interrupts
The interrupt function is used to suspend the routine being executed by any interrupt source and to execute
another routine. An interrupt is used in the following cases:
• When processing of a higher priority than the routine being executed is requested.
• When processing is requested to be performed according to a special timing.
Table 1.11.1 lists the interrupt sources available in the 7480 Group and 7481 Group.
Table 1.11.1 Interrupt Sources
Priority
Order
Interrupt Source
Vector Address
High-order Low-order
Comments
1
Reset (Note 1)
FFFF16 FFFE16 Non-maskable (Note 2)
2
INT0
FFFD16 FFFC16 External interrupt (Polarity programmable)
INT1
3
Key-on Wakeup
FFFB16
FFFA16
External interrupt (Polarity programmable)
External interrupt
4
CNTR0
FFF916 FFF816 External interrupt (Polarity programmable)
5
CNTR1
FFF716 FFF616 External interrupt (Polarity programmable)
6
Timer X
FFF516 FFF416 Internal interrupt
7
Timer Y
FFF316 FFF216 Internal interrupt
8
Timer 1
FFF116 FFF016 Internal interrupt
9
Timer 2
FFEF16 FFEE16 Internal interrupt
10 Serial I/O Receive
FFED16 FFEC16 Internal interrupt
11 Serial I/O Transmit
FFEB16 FFEA16 Internal interrupt
12 Bus arbitration
FFE916 FFE816 Internal interrupt
13
A-D conversion complete FFE716 FFE616 Internal interrupt
14 BRK instruction
FFE516 FFE416 Non-maskable software interrupt
Notes 1: Reset is included in the above table, as well, because it performs the same operation as interrupts.
2: ‘Non-maskable interrupt’:
this is the interrupt not having the corresponding interrupt request bit and interrupt enable bit. This
interrupt request is accepted regardless of the state of the interrupt disable flag.
7480 Group and 7481 Group User's Manual
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