M30622 Mitsubishi, M30622 Datasheet - Page 53

• Manufacturer Part Number: M30622
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: Mitsubishi

Interrupt
Figure 1.14.2. Format for specifying interrupt vector addresses
Table 1.14.1. Interrupts assigned to the fixed vector tables and addresses of vector tables
Note: Interrupts used for debugging purposes only.
________
Interrupts and Interrupt Vector Tables
Undefined instruction
Overflow
BRK instruction
Address match
Single step (Note)
Watchdog timer
DBC (Note)
NMI
Reset
If an interrupt request is accepted, a program branches to the interrupt routine set in the interrupt vector
table. Set the first address of the interrupt routine in each vector table. Figure 1.14.2 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
Interrupt source
The fixed vector table is a table in which addresses are fixed. The vector tables are located in an area
extending from FFFDC
interrupt routine in each vector table. Table 1.14.1 shows the interrupts assigned to the fixed vector
tables and addresses of vector tables.
Tentative Specifications REV.A
S
pecifications in this manual are tentative and subject to change.
Vector address + 0
Vector address + 1
Vector address + 2
Vector address + 3
Address (L) to address (H)
Vector table addresses
FFFDC
FFFEC
FFFE8
FFFFC
FFFE0
FFFE4
FFFF8
FFFF0
FFFF4
16
to FFFFF
16
16
16
16
16
16
16
16
16
to FFFEB
to FFFFB
to FFFE3
to FFFE7
to FFFF3
to FFFF7
to FFFDF
to FFFEF
to FFFFF
16
. One vector table comprises four bytes. Set the first address of
MSB
16
16
16
16
16
16
16
16
16
0 0 0 0
0 0 0 0
53
Interrupt on UND instruction
Interrupt on INTO instruction
If the vector contains FF
the address shown by the vector in the variable vector table
There is an address-matching interrupt enable bit
Do not use
Do not use
External interrupt by input to NMI pin
Low address
Mid address
High address
0 0 0 0
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Remarks
16
, program execution starts from
LSB
_______
Mitsubishi microcomputers
M16C / 62T Group