PIC16CE624T-04SS View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
PIC16CE624T-04SS Datasheet PDF : 113 Pages
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PIC16CE62X
CLRWDT
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Clear Watchdog Timer
[ label ] CLRWDT
None
00h → WDT
0 → WDT prescaler,
1 → TO
1 → PD
TO, PD
00 0000 0110 0100
CLRWDT instruction resets the
Watchdog Timer. It also resets the
prescaler of the WDT. Status bits TO
and PD are set.
1
1
CLRWDT
Before Instruction
WDT counter =
After Instruction
WDT counter =
WDT prescaler=
TO
=
PD
=
?
0x00
0
1
1
COMF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Complement f
[ label ] COMF f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(f) → (dest)
Z
00 1001 dfff ffff
The contents of register ’f’ are
complemented. If ’d’ is 0, the result is
stored in W. If ’d’ is 1, the result is
stored back in register ’f’.
1
1
COMF
REG1,0
Before Instruction
REG1 =
After Instruction
REG1 =
W
=
0x13
0x13
0xEC
DS40182C-page 70
DECF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Decrement f
[ label ] DECF f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(f) - 1 → (dest)
Z
00 0011 dfff ffff
Decrement register ’f’. If ’d’ is 0, the
result is stored in the W register. If ’d’
is 1, the result is stored back in regis-
ter ’f’.
1
1
DECF CNT, 1
Before Instruction
CNT =
Z
=
After Instruction
CNT =
Z
=
0x01
0
0x00
1
DECFSZ
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Decrement f, Skip if 0
[ label ] DECFSZ f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(f) - 1 → (dest);
skip if result = 0
None
00 1011 dfff ffff
The contents of register ’f’ are
decremented. If ’d’ is 0, the result is
placed in the W register. If ’d’ is 1, the
result is placed back in register ’f’.
If the result is 0, the next instruction,
which is already fetched, is discarded.
A NOP is executed instead making it a
two-cycle instruction.
1
1(2)
HERE
DECFSZ
GOTO
CONTINUE •
•
•
CNT, 1
LOOP
Before Instruction
PC = address HERE
After Instruction
CNT = CNT - 1
if CNT = 0,
PC = address CONTINUE
if CNT ≠ 0,
PC = address HERE+1
© 1999 Microchip Technology Inc.
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