MC9S12HZ256 Datasheet, PDF (567/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Chapter 20
Interrupt (INTV1)
20.1 Introduction
This section describes the functionality of the interrupt (INT) sub-block of the S12 core platform.
A block diagram of the interrupt sub-block is shown in Figure 20-1.
INT
WRITE DATA BUS
HPRIO (OPTIONAL)
HIGHEST PRIORITY
I-INTERRUPT
INTERRUPTS
XMASK
IMASK
INTERRUPT INPUT REGISTERS
AND CONTROL REGISTERS
READ DATA BUS
WAKEUP
RESET FLAGS
VECTOR REQUEST
QUALIFIED
INTERRUPTS
PRIORITY DECODER
INTERRUPT PENDING
VECTOR ADDRESS
Figure 20-1. INT Block Diagram
MC9S12HZ256 Data Sheet, Rev. 2.04
Freescale Semiconductor
567