PIC18F24 MICROCHIP [Microchip Technology], PIC18F24 Datasheet - Page 310
![no-image](/images/no-image-200.jpg)
PIC18F24
Manufacturer Part Number
PIC18F24
Description
28/40-Pin High-Performance, Enhanced Flash Microcontrollers with CAN Module
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F24.pdf
(402 pages)
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MULLW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
DS41159D-page 308
PIC18FXX8
Q Cycle Activity:
Before Instruction
After Instruction
Decode
W
PRODH
PRODL
W
PRODH
PRODL
Q1
Multiply Literal with W
[ label ]
0
(W) x k
None
An unsigned multiplication is carried out
between the contents of W and the 8-bit
literal ‘k’. The 16-bit result is placed in
the PRODH:PRODL register pair.
PRODH contains the high byte. W is
unchanged.
None of the status flags are affected.
Note that neither Overflow nor Carry is
possible in this operation. A Zero result
is possible but not detected.
1
1
literal ‘k’
MULLW
Read
0000
Q2
k
=
=
=
=
=
=
255
0xE2
?
?
0xE2
0xAD
0x08
MULLW
PRODH:PRODL
0xC4
1101
Process
Data
Q3
k
kkkk
registers
PRODH:
PRODL
Write
Q4
kkkk
MULWF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
Q Cycle Activity:
Before Instruction
After Instruction
Decode
W
REG
PRODH
PRODL
W
REG
PRODH
PRODL
Q1
register ‘f’
Multiply W with f
[ label ]
0
a
(W) x (f)
None
An unsigned multiplication is carried out
between the contents of W and the
register file location ‘f’. The 16-bit result
is stored in the PRODH:PRODL
register pair. PRODH contains the high
byte.
Both W and ‘f’ are unchanged.
None of the status flags are affected.
Note that neither Overflow nor Carry is
possible in this operation. A Zero result
is possible but not detected. If ‘a’ is ‘0’,
the Access Bank will be selected,
overriding the BSR value. If ‘a’= 1, then
the bank will be selected as per the
BSR value (default).
1
1
MULWF
Read
0000
Q2
f
=
=
=
=
=
=
=
=
[0,1]
2004 Microchip Technology Inc.
255
0xC4
0xB5
?
?
0xC4
0xB5
0x8A
0x94
MULWF
REG
PRODH:PRODL
001a
Process
Data
Q3
f [,a]
ffff
registers
PRODH:
PRODL
Write
Q4
ffff
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