Skip to main content
Knowledgebase
Home
Renesas Electronics America - Knowledgebase

Is it likely to tally the number of instruction execute state correctly

Latest Updated:12/25/2008

Question:

Unlike H8S family, the software manual of H8SX family does not include the expression used for counting instruction execution state. Is it possible to calculate the number of instruction execute state correctly?

Answer:

No. It cannot calculate the number of instruction execution state correctly since H8SX family performs instruction look-ahead with two-stage pipeline and FiFo. The number of execution state depends on the conbination of instruction, current pipeline and FiFo status.
Suitable Products
H8SX/1720S (H8SX/1720, H8SX/1720S)
H8SX/1668R, H8SX/1668M
H8SX/1663
H8SX/1658R, H8SX/1658M
H8SX/1657
H8SX/1653
H8SX/1650, H8SX/1651
H8SX/1648G, H8SX/1648H
H8SX/1648A, H8SX/1648L
H8SX/1638, H8SX/1638L
H8SX/1580
H8SX/1568
H8SX/1558
H8SX/1544
H8SX/1520R