MC68HC908AP16CFA MOTOROLA [Motorola, Inc], MC68HC908AP16CFA Datasheet - Page 140

• Manufacturer Part Number: MC68HC908AP16CFA
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

System Integration Module (SIM)
Data Sheet
140
Interrupts are latched, and arbitration is performed in the SIM at the start
of interrupt processing. The arbitration result is a constant that the CPU
uses to determine which vector to fetch. Once an interrupt is latched by
the SIM, no other interrupt can take precedence, regardless of priority,
until the latched interrupt is serviced (or the I bit is cleared).
(See
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure
AS MANY INTERRUPTS
AS EXIST ON CHIP
Go to: www.freescale.com
9-10.)
YES
Figure 9-10. Interrupt Processing
INSTRUCTION?
INSTRUCTION?
INSTRUCTION
FROM RESET
INTERRUPT?
FETCH NEXT
INTERRUPT?
I-BIT SET?
I BIT SET?
BREAK
IRQ1
SWI
RTI
NO
NO
NO
NO
NO
YES
YES
YES
YES
LOAD PC WITH INTERRUPT VECTOR
UNSTACK CPU REGISTERS
EXECUTE INSTRUCTION
STACK CPU REGISTERS
MC68HC908AP Family — Rev. 2.5
SET I-BIT
MOTOROLA