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PIC18F010 Datasheet(PDF) 113 Page - Microchip Technology

Part # PIC18F010
Description  High Performance Microcontrollers
PDF  176 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F010 Datasheet(HTML) 113 Page - Microchip Technology

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 2001 Microchip Technology Inc.
Preliminary
DS41142A-page 111
PIC18F010/020
CLRF
Clear f
Syntax:
[label] CLRF
f [,a]
Operands:
0
≤ f ≤ 255
a
∈ [0,1]
Operation:
000h
→ f
1
→ Z
Status Affected:
Z
Encoding:
0110
101a
ffff
ffff
Description:
Clears the contents of the specified
register. If ’a’ is 0, the Access Bank
will be selected, overriding the BSR
value. If ’a’ is 1, the Bank will be
selected as per the BSR value.
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
Read
register ’f’
Process
Data
Write
register ’f’
Example:
CLRF
FLAG_REG
Before Instruction
FLAG_REG
=
0x5A
Z=
?
After Instruction
FLAG_REG
=
0x00
Z=
0
CLRWDT
Clear Watchdog Timer
Syntax:
[ label ] CLRWDT
Operands:
None
Operation:
000h
→ WDT,
000h
→ WDT postscaler,
1
→ TO,
1
→ PD
Status Affected:
TO, PD
Encoding:
0000
0000
0000
0100
Description:
CLRWDT
instruction resets the
Watchdog Timer. It also resets the
postscaler of the WDT. Status bits
TO and PD are set.
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Q2
Q3
Q4
Decode
No
operation
Process
Data
No
operation
Example:
CLRWDT
Before Instruction
WDT counter
=
?
WDT postscaler
=
?
TO
=?
PD
=?
After Instruction
WDT counter
=
0x00
WDT postscaler
=
0
TO
=1
PD
=1



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