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2-17
CPU
[Interrupt Accept Group Register (IAGR)]
R halfword/byte access
During a register read, the interrupt accept group register (IAGR) indicates the smallest group number of the groups
that are generating an interrupt of the interrupt levels accepted by the CPU, which are indicated by IM2 to IM0 of
the PSW. This register is allocated to address x'34000200 in the internal I/O space. The GN4 to GN0 field (5 bits)
corresponds to the interrupt group number. A branch destination of the interrupt program for each group can be
found, for example, by referencing the contents of the address obtained by adding the interrupt accept group register
value to the leading address of the interrupt vector table. The interrupt accept group register is a read only register,
and writing cannot be performed. When there are no interrupt factors of the applicable interrupt level, IAGR
becomes 0.
Accessing IAGR is meaningless during non-maskable interrupts.
Fig. 2-5-3 Interrupt Accept Group Register
[Interrupt Vector Address Register (IVARn)]
R/W halfword access
The interrupt vector register (IVAR0 to IVAR6) contains the lower 16 bits of the start address of the interrupt
handler for interrupts of the accepted level. This register is allocated between addresses x'20000000 to x'20000018
in the internal I/O space. The start address of interrupt levels 0 to 6 correspond to IVAR0 to IVAR6. When an
interrupt occurs, control is transferred to the address which is comprised of the upper 16 bits (x'4000) and the lower
16 bits (IVARn). This register is undefined when the system is reset.
Fig. 2-5-4 Interrupt Vector Address Register
0
0
15
0
14 13
12 11 10
9
8
7
6
5
4
3
2
1
0
0
0
0
0
0
0
GN
0
IAGR
0
15
0
14 13 12 11 10
9
8
7
6
5
4
3
2
1
IVARn
Summary of Contents for MN103001G/F01K
Page 1: ...MICROCOMPUTER MN1030 MN103001G F01K LSI User s Manual Pub No 23101 050E ...
Page 2: ......
Page 4: ......
Page 6: ......
Page 8: ......
Page 9: ...Table of Contents List of Figures and Tables 0 ...
Page 26: ...xviii ...
Page 27: ...1 0 1 General Specifications ...
Page 35: ...2 CPU 2 ...
Page 57: ...3 Extension Instruction Specifications 3 ...
Page 96: ...Extension Instruction Specifications 3 40 ...
Page 97: ...4 Memory Modes 3 4 ...
Page 102: ...Memory Modes 4 6 ...
Page 103: ...5 Operating Mode 5 ...
Page 107: ...6 Clock Generator 6 13 ...
Page 111: ...7 Internal Memory 7 ...
Page 114: ...Internal Memory 7 4 ...
Page 115: ...8 Bus Controller BC 8 ...
Page 189: ...9 Interrupt Controller 9 ...
Page 220: ...Interrupt Controller 9 32 ...
Page 221: ...10 8 bit Timers 9 10 ...
Page 254: ...8 bit Timers 10 34 ...
Page 255: ...11 16 bit Timers 11 ...
Page 292: ...16 bit Timers 11 38 ...
Page 293: ...12 Watchdog Timer 11 12 ...
Page 302: ...Watchdog Timer 12 10 ...
Page 303: ...13 Serial Interface 13 ...
Page 354: ...Serial Interface 13 52 ...
Page 355: ...14 A D Converter 14 ...
Page 367: ...15 I O Ports 15 ...
Page 431: ...16 Internal Flash Memory 16 ...
Page 439: ...17 17 Ordering Mask ROM ...
Page 442: ...Ordering Mask ROM 17 4 ...
Page 443: ...Appendix ...