z8f0822 ZiLOG Semiconductor, z8f0822 Datasheet - Page 72

• Manufacturer Part Number: z8f0822
• Description: High Performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Architecture
Operation
PS022517-0508
Master Interrupt Enable
Figure 9
The master interrupt enable bit (IRQE) in the Interrupt Control Register globally enables
and disables interrupts.
Interrupts are globally enabled by any of the following actions:
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•
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Interrupts are globally disabled by any of the following actions:
•
•
•
•
•
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Internal Interrupts
Port Interrupts
Execution of an
Execution of an
Writing a 1 to the IRQE bit in the Interrupt Control Register.
Execution of a
eZ8 CPU acknowledgement of an interrupt service request from the interrupt controller.
Writing a 0 to the IRQE bit in the Interrupt Control Register.
Reset.
Execution of a Trap instruction.
Illegal Instruction trap.
displays a block diagram of the interrupt controller.
DI
Figure 9. Interrupt Controller Block Diagram
EI
IRET
(Disable Interrupt) instruction.
(Enable Interrupt) instruction.
(Return from Interrupt) instruction.
Medium
Priority
Priority
Priority
High
Low
Priority
Z8 Encore! XP
Mux
Vector
IRQ Request
Product Specification
®
Interrupt Controller
F0822 Series
59