MC68HC11F1_13 Datasheet, PDF (75/158 Pages) Freescale Semiconductor, Inc – Technical Data

Freescale Semiconductor, Inc.
1B
YES
I BIT IN
CCR SET
?
NO
ANY I BIT
INTERRUPT
YES
PENDING
?
NO
STACK CPU
REGISTERS
SET X AND I BITS
FETCH VECTOR
$FFE8, FFE9
FETCH OPCODE
YES
ILLEGAL
OPCODE
?
NO
WAI
YES
?
NO
STACK CPU
REGISTERS
STACK CPU
REGISTERS
STACK CPU
YES
REGISTERS
SET X AND I BITS
FETCH VECTOR
$FFE6, FFE7
YES
RESTORE CPU
REGISTERS
FROM STACK
SWI
?
NO
RTI
?
NO
EXECUTE THIS
INSTRUCTION
NO
INTERRUPT
YET
?
YES
SET I BIT
RESOLVE INTERRUPT
PRIORITY AND FETCH
VECTOR FOR HIGHEST
PENDING SOURCE
(REFER TO FIGURE 5-2)
START NEXT
1A _INSTRUCTION
SEQUENCE
Figure 5-2 Processing Flow Out of Reset (2 of 2)
TECHNICAL DATA
RESETS AND INTERRUPTS
For More Information On This Product,
Go to: www.freescale.com
5-13