PIC18F2331-E/ML MICROCHIP [Microchip Technology], PIC18F2331-E/ML Datasheet - Page 310
![no-image](/images/no-image-200.jpg)
PIC18F2331-E/ML
Manufacturer Part Number
PIC18F2331-E/ML
Description
28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F2331-EML.pdf
(392 pages)
- Current page: 310 of 392
- Download datasheet (4Mb)
PIC18F2331/2431/4331/4431
MULLW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
DS39616D-page 310
Q Cycle Activity:
Before Instruction
After Instruction
Decode
W
PRODH
PRODL
W
PRODH
PRODL
Q1
literal ‘k’
Multiply Literal with W
[ label ]
0 k 255
(W) x k PRODH:PRODL
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 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
MULLW
Read
0000
Q2
=
=
=
=
=
=
0xE2
?
?
0xE2
0xAD
0x08
MULLW
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 f 255
a [0,1]
(W) x (f) PRODH:PRODL
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.
1
1
MULWF
Read
0000
Q2
=
=
=
=
=
=
=
=
2010 Microchip Technology Inc.
0xC4
0xB5
?
?
0xC4
0xB5
0x8A
0x94
MULWF
REG
001a
Process
Data
Q3
f [,a]
ffff
PRODH:
registers
PRODL
Write
Q4
ffff
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