dsp56800e Freescale Semiconductor, Inc, dsp56800e Datasheet - Page 562

• Manufacturer Part Number: dsp56800e
• Description: 16-bit Digital Signal Controller Core
• Manufacturer: Freescale Semiconductor, Inc

MPY
Parallel Dual Reads:
Instruction Opcodes:
Timing:
Memory:
A-218
MPY
MPY
MPY
MPY
MPY
1.This instruction is not allowed when the XP bit in the OMR is set (that is, when the instructions are executing
from data memory).
2.This instruction occupies only 1 program word and executes in 1 cycle for every addressing mode.
Operation
MPY
Data ALU Operation
–Q1,Q2,FFF
FFF1,FFF1,FFF
Q1,Q2,F GGG,X:<ea_m>
Q1,Q2,F X:<ea_m>,GGG
Q3,Q4,F X:<ea_m>,reg1
2
1 oscillator clock cycle
1 program word
X:<ea_v>,reg2
Operands
Y1,X0,F
Y1,Y0,F
Y0,X0,F
C1,Y0,F
1
DSP56800E Core Reference Manual
15
15
15
15
15
0
0
0
0
0
Signed Multiply
Source 1
X:(R0)+N
X:(R1)+N
X:(R4)+N
X:(R0)+N
X:(R4)+N
X:(R0)+
X:(R1)+
X:(R4)+
X:(R0)+
X:(R4)+
1
0
0
1
1
First Memory Read
1
0
1
1
1
12
12
12
12
12
0
0
0
0
1
11
11
11
11
11
1
0
0
0
0
Destination 1
G
G
0
0
1
Y0
Y1
Y0
Y1
G
G
F
F
v
G
G
F
F
v
8
8
8
8
8
F
F
F
F
F
7
7
7
7
7
X:(R3)+N3
X:(R3)+N3
Source 2
Q
Q
Q
X:(R3)+
X:(R3)–
X:(R3)+
X:(R3)+
J
v
Second Memory Read
Freescale Semiconductor
Q
Q
Q
Q
J
Q
Q
Q
Q
J
4
4
4
4
4
J
1
1
1
0
3
3
3
3
3
Destination 2
m
m
m
0
J
MPY
X0
X0
C
R
R
0
0
1
R
R
1
v
1
0
0
0
0
0