mc68ec060 Freescale Semiconductor, Inc, mc68ec060 Datasheet - Page 247

• Manufacturer Part Number: mc68ec060
• Description: Mc68060 Superscalar 68k Microprocessor Including The Lc060 And Ec060
• Manufacturer: Freescale Semiconductor, Inc

error occurs during the exception processing sequence for a reset, a double bus fault is gen-
erated. The processor halts and signals the double bus fault status on the processor status
outputs ([PST4–PST0] = $1C). Execution of the reset instruction does not cause a reset
exception, nor does it affect any internal registers except the PC. The execution of this
MOTOROLA
AUTOVECTOR #25–#31
Figure 8-4. Interrupt Exception Processing Flowchart
IF NO VECTOR #
OF FIRST INSTRUCTION
FROM INTERRUPTING
CALCULATE ADDRESS
BEGIN INSTRUCTION
I2–I0
VECTOR OFFSET,
FETCH VECTOR
SAVE INTERNAL
PC, AND SR
STACK FRAME
OF HANDLER
FETCH FIRST
INSTRUCTION
OF HANDLER
OTHERWISE
EXECUTION
S
COPY OF SR
T
DEVICE
ENTRY
=
=
=
EXIT
0
LEVEL OF
INTERRUPT
M68060 USER’S MANUAL
1
BUS ERROR
SPURIOUS INTERRUPT
VECTOR #24
ADDRESS ERROR
BUS ERROR OR
BUS ERROR
ACCESS ERROR
PROCESS
EXIT
Exception Processing
8-15