Z8F1602 ZILOG [Zilog, Inc.], Z8F1602 Datasheet - Page 64

• Manufacturer Part Number: Z8F1602
• Description: Z8 Encore Microcontrollers with Flash Memory and 10-Bit A/D Converter
• Manufacturer: ZILOG [Zilog, Inc.]

Architecture
Operation
PS017610-0404
Master Interrupt Enable
Figure 65 illustrates a block diagram of the interrupt controller.
Figure 65. Interrupt Controller Block Diagram
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:
•
•
•
Interrupts are globally disabled by any of the following actions:
•
•
•
•
Internal Interrupts
Port Interrupts
Execution of an EI (Enable Interrupt) instruction
Execution of an IRET (Return from Interrupt) instruction
Writing a 1 to the IRQE bit in the Interrupt Control register
Execution of a DI (Disable Interrupt) instruction
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
Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
Medium
Priority
Priority
Priority
High
Low
Priority
Mux
Vector
IRQ Request
Interrupt Controller
Z8 Encore!
®
46