GMS84512 Datasheet, PDF (77/123 Pages) Hynix Semiconductor – 8-BIT SINGLE CHIP MICROCOMPUTER

GMS 84512 / 84524
4.1 INTERRUPTS
GMS84512/84524 has the following function to process interrupt request from the peripheral and
external interrupt pin.
l Interrupt Source : 14
l Interrupt Vector : 14
l Multi Interrupt Possible.
l Programmable Interrupt Mode
¨ç Hardware Priority Mode
¨è Software Selection Mode
l R/W of Interrupt Request Flag is possible and in Interrupt Accept, automalically resetted.
4.1.1 Interrupt Circuit Configuration and Kinds
GMS84512/84524 Interrupt circuits is consist of Interrupt Enable Register (IENH,IENL), Interrupt
Request Register (IRQH,IRQL), priority circuit and selecting circuit. Configuration of Interrupt circuit is
shown in Fig. 4.1.1
The Interrupt sources are external interrupt source(INT1, INT2, INT3, V-sync), peripheral function
source(OSD,T0,T1,T2,T3,1ms,WDT,BIT,Serial I/O) and software interrupt source(BRK).
In the case of reset input(RESET), the program execution at the start address located in vector table
address like general interrupt.
The classification of interrupt source is shown in Table 4.1.1.
4-1