Samsung S3F80JB manual Interrupt Processing Control Points, Interrupt Function Diagram

INTERRUPT STRUCTURE S3F80JB

INTERRUPT PROCESSING CONTROL POINTS

Interrupt processing can therefore be controlled in two ways: globally or by a specific interrupt level and source. The system-level control points in the interrupt structure are, therefore:

—Global interrupt enable and disable (by EI and DI instructions or by a direct manipulation of SYM.0)

—Interrupt level enable/disable settings (IMR register)

—Interrupt level priority settings (IPR register)

—Interrupt source enable/disable settings in the corresponding peripheral control registers

NOTE

When writing the part of your application program that handles the interrupt processing, be sure to include the necessary register file address (register pointer) information.

EI

nRESET

IRQ0-IRQ7 Interrupts

S	Q	Interrupt Request Register
R		(Read-only)

Interrupt Priority

Register

Interrupt Mask

Register

Polling

Cycle

Vector

Interrupt

Cycle

Global Interrupt Control

(EI, DI or SYM.0 manipulation)

Figure 5-4. Interrupt Function Diagram

5-8