z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 96

• Manufacturer Part Number: z16f2811
• Description: High Performance Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Architecture
Operation
PS022006-0207
Master Interrupt Enable
Figure 18
The master interrupt enable bit in the flag register globally enables or disables interrupts.
This bit has been moved to the flag register (bit-0). Thus, anytime the register is loaded, it
changes the state of the IRQE bit. For the
been pushed on the stack.
Interrupts are globally enabled by any of the following actions:
•
•
Interrupts are globally disabled by any of the following actions:
•
•
•
Internal Interrupts
Port Interrupts
controller
Execution of an Enable Interrupt (
Writing 1 to the IRQE bit in the flag register
Execution of a Disable Interrupt (
ZNEO CPU acknowledgement of an interrupt service request from the interrupt
Writing 0 to the IRQE bit in the flag register
illustrates a block diagram of the interrupt controller.
Figure 18. Interrupt Controller Block Diagram
P R E L I M I N A R Y
DI
EI
Medium
Priority
Priority
Priority
High
Low
) instruction
) instruction
IRET
instruction the bit is set based on what has
Priority
Mux
Vector
Product Specification
IRQ Request
ZNEO
Interrupt Controller
™
Z16F Series
82