GMS81508A Datasheet, PDF (43/91 Pages) Hynix Semiconductor – USERS MANUAL

HYUNDAI MicroElectronics

Interrupt Source
The interrupts sources are external interrupt source(INT0, INT1,INT2,INT3), peripheral function
source (T0,T1,T2,T3,B.I.T.,W.D.T.,SIO,A/DC) and software interrupt source(BRK).
After reset input(RESET), the program is executed from the address in reset vector table like
general interrupts.
Type
Mask
Priority
Interrupt Request Source
Non
Maskable
H/W
Interrupt
S/W Interrupt
Non
Maskable
1 RST Reset Pin
2 INT0R External Interrupt 0
3 INT1R External Interrupt 1
4 INT2R External Interrupt 2
5 INT3R External Interrupt 3
6 T0R Timer 0
7 T1R Timer 1
8 T2R Timer 2
9 T3R Timer 3
10 AR
A/D Converter
11 WDTR Watch Dog Timer
12 BITR Basic Interval Timer
13 SR
Serial I/O
BRK Break Instruction
Vector
H
FFFF_H
Vector
L
FFFE_H
FFFB_H
FFF9_H
FFF7_H
FFF5_H
FFF3_H
FFF1_H
FFEF_H
FFED_H
FFEB_H
FFE9_H
FFE7_H
FFE5_H
FFDF_H
FFFA_H
FFF8_H
FFF6_H
FFF4_H
FFF2_H
FFF0_H
FFEE_H
FFFC_H
FFEA_H
FFE8_H
FFE6_H
FFE4_H
FFDE_H
2.12.2. Interrupt Control
The interrupts is controlled by the interrupt master enable flag I-Flag(3'rd bit of PSW), interrupt
enable register(IENH,IENL), interrupt request register(IRQH,IRQL) except RESET and S/W
interrupt.

Interrupt Enable Register ( IENH, IENL)
This register is composed of interrupt enable flags of each interrupt source, this flags determines
whether an interrupt will be accepted or not. when enable flag is "0", an interrupt corresponding
interrupt source is prohibited.
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