MC68HC11E9PB3 View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
'MC68HC11E9PB3' PDF : 242 Pages View PDF
Resets and Interrupts
2A
Y
BIT I IN
CCR = 1?
N
ANY I-BIT Y
INTERRUPT
PENDING?
N
FETCH OPCODE
STACK CPU
REGISTERS
STACK CPU
REGISTERS
SET BIT I IN CCR
FETCH VECTOR
$FFF8, $FFF9
Y
ILLEGAL
OPCODE?
N
WAI
Y
INSTRUCTION?
N
STACK CPU
REGISTERS
SET BIT I IN CCR
Y
SWI
INSTRUCTION?
N
FETCH VECTOR
$FFF6, $FFF7
Y
RTI
INSTRUCTION?
RESTORE CPU
REGISTERS
FROM STACK
N
EXECUTE THIS
INSTRUCTION
STACK CPU
REGISTERS
N
ANY
INTERRUPT
PENDING?
Y
SET BIT I IN CCR
RESOLVE INTERRUPT
PRIORITY AND FETCH
VECTOR FOR HIGHEST
PENDING SOURCE
SEE FIGURE 5–2
1A
Figure 5-5. Processing Flow Out of Reset (Sheet 2 of 2)
M68HC11E Family Data Sheet, Rev. 5.1
92
Freescale Semiconductor
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