PIC18F2450 MICROCHIP [Microchip Technology], PIC18F2450 Datasheet - Page 229

• Manufacturer Part Number: PIC18F2450
• Description: 28/40/44-Pin, High-Performance, 12 MIPS, Enhanced Flash, USB Microcontrollers with nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

CLRF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
© 2006 Microchip Technology Inc.
Q Cycle Activity:
Before Instruction
After Instruction
Decode
FLAG_REG
FLAG_REG
Q1
register ‘f’
Clear f
CLRF
0
a
000h
1
Z
Clears the contents of the specified
register.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f
Section 19.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
1
1
CLRF
Read
0110
Q2
=
=
f
[0,1]
Z
255
f {,a}
f,
5Ah
00h
101a
FLAG_REG,1
Process
Data
Q3
95 (5Fh). See
ffff
register ‘f’
Advance Information
Write
Q4
ffff
CLRWDT
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
Q Cycle Activity:
Before Instruction
After Instruction
Decode
WDT Counter
WDT Counter
WDT Postscaler
TO
PD
PIC18F2450/4450
Q1
operation
Clear Watchdog Timer
CLRWDT
None
000h
000h
1
1
TO, PD
CLRWDT instruction resets the
Watchdog Timer. It also resets the
postscaler of the WDT. Status bits, TO
and PD, are set.
1
1
CLRWDT
0000
No
Q2
TO,
PD
WDT,
WDT postscaler,
=
=
=
=
=
0000
?
00h
0
1
1
Process
Data
Q3
DS39760A-page 227
0000
operation
No
Q4
0100