MC68340 datasheet(250/441 Pages) FREESCALE

250 / 441 page

MOTOROLA

MC68340 USER’S MANUAL

5- 113

5.7.3.14 SAVE AND RESTORE OPERATIONS. The save and restore operations table

indicates the number of clock periods needed for the processor to perform the specified

state save or return from exception. Complete execution times and stack length are given.

No additional tables are needed to calculate total effective execution time for these

instructions. The total number of clock cycles is outside the parentheses. The numbers

inside parentheses (r/p/w) are included in the total clock cycle number. All timing data

assumes two-clock reads and writes.

Instruction

Head

Tail

Cycles

BERR on instruction

−2

<58(2/2/12)

BERR on exception

−2

48(2/2/12)

RTE (four-word frame)

−2

24(4/2/0)

RTE (six-word frame)

−2

26(4/2/0)

RTE (BERR on instruction)

−2

50(12/12/Y)

RTE (BERR on four-word frame)

−2

66(10/2/4)

RTE (BERR on six-word frame)

−2

70(12/2/6)

< = Maximum time is indicated (certain data or mode combinations execute faster).

Y = If a bus error occurred during a write cycle, the cycle is rerun by the RTE.

Freescale Semiconductor, Inc.

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MC68340 Datasheet(PDF) 250 Page - Freescale Semiconductor, Inc