Datasheet

PIC16C62X
DS30235J-page 66  2003 Microchip Technology Inc.
CLRW Clear W
Syntax: [ label ] CLRW
Operands: None
Operation: 00h → (W)
1 → Z
Status Affected: Z
Encoding:
00 0001 0000 0011
Description: W register is cleared. Zero bit (Z)
is set.
Words: 1
Cycles: 1
Example
CLRW
Before Instruction
W = 0x5A
After Instruction
W = 0x00
Z=1
CLRWDT Clear Watchdog Timer
Syntax: [ label ] CLRWDT
Operands: None
Operation: 00h → WDT
0 → WDT prescaler,
1 → TO
1 → PD
Status Affected: TO, PD
Encoding:
00 0000 0110 0100
Description: CLRWDT instruction resets the
Watchdog Timer. It also resets the
prescaler of the WDT. STATUS
bits TO
and PD are set.
Words: 1
Cycles: 1
Example
CLRWDT
Before Instruction
WDT counter = ?
After Instruction
WDT counter = 0x00
WDT prescaler= 0
TO =1
PD =1
COMF Complement f
Syntax: [ label ] COMF f,d
Operands: 0 ≤ f ≤ 127
d ∈ [0,1]
Operation: (f) → (dest)
Status Affected: Z
Encoding:
00 1001 dfff ffff
Description: 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'.
Words: 1
Cycles: 1
Example
COMF REG1,0
Before Instruction
REG1 = 0x13
After Instruction
REG1 = 0x13
W=0xEC
DECF Decrement f
Syntax: [ label ] DECF f,d
Operands: 0 ≤ f ≤ 127
d ∈ [0,1]
Operation: (f) - 1 → (dest)
Status Affected: Z
Encoding:
00 0011 dfff ffff
Description: 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 register 'f'.
Words: 1
Cycles: 1
Example
DECF CNT,
1
Before Instruction
CNT = 0x01
Z=0
After Instruction
CNT = 0x00
Z=1