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Appendix A CPU Instruction Set
Rev. 6.00 Sep 12, 2006 page 435 of 526
REJ09B0326-0600
A.3
Number of Execution States
The tables here can be used to calculate the number of states required for instruction execution.
Table A.3 indicates the number of states required for each cycle (instruction fetch, branch address
read, stack operation, byte data access, word data access, internal operation).
Table A.4 indicates the number of cycles of each type occurring in each instruction. The total
number of states required for execution of an instruction can be calculated from these two tables as
follows:
Execution states = I
×
S
I
+ J
×
S
J
+ K
×
S
K
+ L
×
S
L
+ M
×
S
M
+ N
×
S
N
Examples:
When instruction is fetched from on-chip ROM, and an on-chip RAM is accessed.
BSET #0, @FF00
From table A.4:
I = L = 2, J = K = M = N= 0
From table A.3:
S
I
= 2, S
L
= 2
Number of states required for execution = 2
×
2 + 2
×
2 = 8
When instruction is fetched from on-chip ROM, branch address is read from on-chip ROM, and
on-chip RAM is used for stack area.
JSR @@ 30
From table A.4:
I = 2, J = K = 1, L = M = N = 0
From table A.3:
S
I
= S
J
= S
K
= 2
Number of states required for execution = 2
×
2 + 1
×
2+ 1
×
2 = 8
Summary of Contents for F-ZTAT H8/3642A Series
Page 6: ...Rev 6 00 Sep 12 2006 page iv of xx ...
Page 8: ...Rev 6 00 Sep 12 2006 page vi of xx ...
Page 22: ...Rev 6 00 Sep 12 2006 page xx of xx ...
Page 124: ...Section 5 Power Down Modes Rev 6 00 Sep 12 2006 page 102 of 526 REJ09B0326 0600 ...
Page 188: ...Section 6 ROM Rev 6 00 Sep 12 2006 page 166 of 526 REJ09B0326 0600 ...
Page 190: ...Section 7 RAM Rev 6 00 Sep 12 2006 page 168 of 526 REJ09B0326 0600 ...
Page 298: ...Section 9 Timers Rev 6 00 Sep 12 2006 page 276 of 526 REJ09B0326 0600 ...
Page 378: ...Section 12 A D Converter Rev 6 00 Sep 12 2006 page 356 of 526 REJ09B0326 0600 ...
Page 446: ...Section 13 Electrical Characteristics Rev 6 00 Sep 12 2006 page 424 of 526 REJ09B0326 0600 ...