Samsung 8-Bit Manual do Utilizador descarregar pdf (Página 312)

100

101

INTERRUPT STRUCTURE S3C9228/P9228

5-2

INTERRUPT PENDING FUNCTION TYPES

When the interrupt service routine has executed, the application program's service routine must clear the

appropriate pending bit before the return from interrupt subroutine (IRET) occurs.

INTERRUPT PRIORITY

Because there is not a interrupt priority register in SAM87RCRI, the order of service is determined by a sequence

of source which is executed in interrupt service routine.

Interrupt Pending

Global Interrupt

Control (EI, Di instruction)

Vector

Interrupt

Cycle

Interrpt priority

is determind by

software polling

method

"EI" Instruction

Execution

RESET

Source

Interrupts

Source

Interrupt

Enable

Figure 5-2. Interrupt Function Diagram

1 2 ... 307 308 309 310 311 312 313 314 315 316 317 ... 461 462

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