MC68HC000RC12 Datasheet, PDF (127/189 Pages) Freescale Semiconductor, Inc – 8-/16-/32-Bit Microprocessors User’s Manual

Freescale Semiconductor, Inc.
the handler routine. The total number of clock periods, the number of read cycles, and the
number of write cycles are shown in the previously described format. The number of clock
periods, the number of read cycles, and the number of write cycles, respectively, must be
added to those of the effective address calculation where indicated by a plus sign (+).
Table 8-14. Exception Processing
Execution Times
Exception
Periods
Address Error
50(4/7)
Bus Error
50(4/7)
CHK Instruction
40(4/3)+
Divide by Zero
38(4/3)+
Illegal Instruction
34(4/3)
Interrupt
44(5/3)*
Privilege Violation
34(4/3)
RESET **
40(6/0)
Trace
34(4/3)
TRAP Instruction
34(4/3)
TRAPV Instruction
34(5/3)
+ Add effective address calculation time.
* The interrupt acknowledge cycle is assumed to take
four clock periods.
** Indicates the time from when RESET and HALT are first
sampled as negated to when instruction execution starts.
MOTOROLA
MC68000 8-/16-/32-MICROPROCESSORS USER’S MANUAL
8-11
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