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M30222 Fiches technique(PDF) 37 Page - Mitsubishi Electric Semiconductor

No de pièce M30222
Description  SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Download  237 Pages
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Fabricant  MITSUBISHI [Mitsubishi Electric Semiconductor]
Site Internet  http://www.mitsubishichips.com
Logo MITSUBISHI - Mitsubishi Electric Semiconductor

M30222 Fiches technique(HTML) 37 Page - Mitsubishi Electric Semiconductor

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1-38
Under
development
Specifications in this manual are tentative and subject to change
Rev. G
Overview of Interrupts
MITSUBISHI MICROCOMPUTERS
M30222 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Interrupts and Interrupt Vector Tables
If an interrupt request is accepted, program execution branches to the interrupt routine set in the
interrupt vector table. Set the first address of the interrupt routine in each vector table. Figure 1.22
shows the format for specifying the address.
Two types of interrupt vector tables are available — fixed vector table in which addresses are fixed
and variable vector table in which addresses can be varied by the setting.
• Fixed vector tables
The fixed vector table is a table in which addresses are fixed. The vector tables are located in an area
extending from FFFDC16 to FFFFF16. One vector table comprises four bytes. Set the first address of
interrupt routine in each vector table. Table 1.17 shows the interrupts assigned to the fixed vector tables and
addresses of vector tables.
Figure 1.22. Format for specifying interrupt vector addresses
Table 1.17. Interrupts assigned to the fixed vector tables and addresses of vector tables
Mid address
Low address
0 0 0 0
High address
0 0 0 0
0 0 0 0
Vector address + 0
Vector address + 1
Vector address + 2
Vector address + 3
LSB
MSB
Interrupt source
Vector table addresses
Remarks
Address (L) to address (H)
Undefined instruction
FFFDC16 to FFFDF16
Interrupt on UND instruction
Overflow
FFFE0 16 to FFFE3 16
Interrupt on overflow
BRK instruction
FFFE4 16 to FFFE716
If thisvector contains FFFFF16, program execution starts from
the address shown by the vector in the variable vector table
Address match
FFFE8 16 to FFFEB16
Requires address-matching interrupt enable bit
Single step (Note)
FFFEC16 to FFFEF16
Do not use
Watchdog timer
FFFF016 to FFFF316
DBC (Note)
FFFF416 to FFFF716
Do not use
NMI
FFFF816 to FFFFB16
External interrupt by input to NMI pin
Reset
FFFFC 16 to FFFFF16
Note: Interrupts used for debugging purposes only.


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