mc68ec060 Freescale Semiconductor, Inc, mc68ec060 Datasheet - Page 234

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

Exception Processing
number. For all other exceptions, internal logic provides the vector number. This vector num-
ber is used in the last step to calculate the address of the exception vector. Throughout this
section, vector numbers are given in decimal notation.
8-2
NOTE: THESE BLOCKS VARY FOR RESET AND INTERRUPT EXCEPTIONS.
VECTOR = 2
S 1
T 0
Figure 8-1. General Exception Processing Flowchart
ACCESS ERROR EXCEPTION
IF NOT PROCESSING AN
ADDRESS ERROR
BUS ERROR OR
M68060 USER’S MANUAL
EXCEPTION HANDLER
DETERMINE VECTOR
EXCEPTION HANDLER
ADDRESS OF FIRST
BEGIN EXECUTION
TO STACK FRAME
INSTRUCTION OF
SAVE CONTENTS
INSTRUCTION OF
SAVE INTERNAL
OF EXCEPTION
CALCULATE
FETCH FIRST
COPY OF SR
(SEE NOTE)
OTHERWISE
OTHERWISE
(SEE NOTE)
HANDLER
NUMBER
ENTRY
EXIT
S 1
T 0
BUS ERROR
ACCESS ERROR EXCEPTION
IF PROCESSING AN
ADDRESS ERROR
BUS ERROR OR
(DOUBLE BUS FAULT)
(DOUBLE BUS FAULT)
PST4–PST0 = $1C
HALTED STATE
EXIT
MOTOROLA