9. Interrupts
puorG92/C61M
page 73
854fo7002,03.raM21.1.veR
2110-1010B90JER
Interrupt source Vector table addresses Remarks Reference
Address (L) to address (H)
Undefined instruction FFFDC16 to FFFDF16 Interrupt on UND instruction M16C/60, M16C/20
Overflow FFFE016 to FFFE316 Interrupt on INTO instruction serise software
BRK instruction FFFE416 to FFFE716 maual
Address match FFFE816 to FFFEB16
Address match interrupt
Single step (1) FFFEC16 to FFFEF16
Watchdog timer FFFF016 to FFFF316 Watchdog timer,
Oscillation stop and clock generating circuit,
re-oscillation detection, voltage detection circuit
low voltage detection
________
DBC (1) FFFF416 to FFFF716
_______
NMI FFFF816 to FFFFB16
_______
NMI interrupt
Reset(2) FFFFC16 to FFFFF16 Reset
NOTE:
1. Do not normally use this interrupt because it is provided exclusively for use by development tools.
Figure 9.2 Interrupt Vector
9.2 Interrupts and Interrupt Vector
One interrupt vector consists of 4 bytes. Set the start address of each interrupt routine in the respective
interrupt vectors. When an interrupt request is accepted, the CPU branches to the address set in the
corresponding interrupt vector. Figure 9.2 shows the interrupt vector.
9.2.1 Fixed Vector Tables
The fixed vector tables are allocated to the addresses from FFFDC16 to FFFFF16. Table 9.1 lists the
fixed vector tables. In the flash memory version of MCU, the vector addresses (H) of fixed vectors are
used by the ID code check function. For details, refer to the section "flash memory rewrite disabling
function".
Table 9.1 Fixed Vector Tables
If the contents of address
FFFE716 is FF16, program ex-
ecution starts from the address
shown by the vector in the
relocatable vector table
Mid address
Low address
0 0 0 0 High address
0 0 0 0 0 0 0 0
Vector address (L)
LSB
MSB
Vector address (H)
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