Interrupt Vector Register - Panasonic MN103S User Manual

Chapter 5
Interrupt Controller
5.2.3

Interrupt Vector Register

The interrupt vector register is a register that stores the lower 16 bits of the starting address of the processing pro-
gram for the accepted level interrupts. The starting addressees of level 0 to 6 of the level interrupts correspond to
IVAR0 to IVAR 6. When an interrupt occurs, control is transferred from the upper 16 bits to"0x'4000" and from
the lower 16 bits to the 32-bit address which is comprised of IVARn corresponding to the interrupt level.
Table:5.2.4 Interrupt Level and Interrupt Vector Register
Interrupt level
0
1
2
3
4
5
6
Interrupt Vector Register 0 (IVAR0: 0x00008000) [16-bit access register]
bp 15
Flag IVAR
015
At reset x
Access R/W
Interrupt Vector Register 1 (IVAR1: 0x00008004) [16-bit access register]
bp 15
Flag IVAR
115
At reset x
Access R/W
V - 10 Control Registers
Interrupt vector register
IVAR0
IVAR1
IVAR2
IVAR3
IVAR4
IVAR5
IVAR6
14 13 12 11
IVAR IVAR IVAR IVAR
014 013 012 011
x x x x
R/W R/W R/W R/W
14 13 12 11
IVAR IVAR IVAR IVAR
114 113 112 111
x x x x
R/W R/W R/W R/W
10 9 8 7
IVAR IVAR IVAR IVAR
010 09 08 07
x x x x
R/W R/W R/W R/W
10 9 8 7
IVAR IVAR IVAR IVAR
110 19 18 17
x x x x
R/W R/W R/W R/W
6 5 4 3
IVAR IVAR IVAR IVAR
06 05 04 03
x x x x
R/W R/W R/W R/W
6 5 4 3
IVAR IVAR IVAR IVAR
16 15 14 13
x x x x
R/W R/W R/W R/W
2 1 0
IVAR IVAR IVAR
02 01 00
x x x
R/W R/W R/W
2 1 0
IVAR IVAR IVAR
12 11 10
x x x
R/W R/W R/W