Freescale Semiconductor, Inc.
Instruction
Dn:Dm, Dp
Head
Tail
0
Cycles
34-40(0/2/0)
3(0/1/0)
TBLUN
30
1
*
TBLUN (Save)
TBLUN (Op)
CEA , Dn
CEA , Dn
1
6
0
39-45(2X/1/0)
X
= There is one bus cycle for byte and word operands and two bus cycles for long
operands. For long bus cycles, add two clocks to the tail and to the number of
cycles.
<
= Maximum time (certain data or mode combinations may execute faster).
su = The execution time is identical for signed or unsigned operands.
*
These instructions have an additional save operation that other instructions do not have. To
calculate total instruction time, calculate save, ea , and operation execution times, then
combine in the order shown, using equations in 5.7.1.6 Instruction Execution Time
Calculations. A save operation is not run for long-word divide and multiply instructions
when FEA = Dn,
5-104
MC68340 USER’S MANUAL
MOTOROLA
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