|
PIC16F627A Datasheet, PDF (118/168 Pages) Microchip Technology – FLASH-Based 8-Bit CMOS Microcontrollers | |||
|
◁ |
PIC16F627A/628A/648A
CLRW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Clear W
[ label ] CLRW
None
00h â (W)
1âZ
Z
00
0001 0000 0011
W register is cleared. Zero bit
(Z) is set.
1
1
CLRW
Before Instruction
W = 0x5A
After Instruction
W = 0x00
Z =1
CLRWDT
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Clear Watchdog Timer
[ label ] CLRWDT
None
00h â WDT
0 â WDT prescaler,
1 â TO
1 â 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 = 0x00
WDT prescaler = 0
TO
=1
PD
=1
COMF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Complement f
[ label ] COMF f,d
0 ⤠f ⤠127
d â [0,1]
(f) â (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 = 0x13
After Instruction
REG1 = 0x13
W
= 0xEC
DECF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Decrement f
[ label ] DECF f,d
0 ⤠f ⤠127
d â [0,1]
(f) - 1 â (dest)
Z
00 0011 dfff ffff
Decrement register 'f'. If 'd' is 0
the result is stored in the W reg-
ister. If 'd' is 1 the result is stored
back in register 'f'.
1
1
DECF CNT, 1
Before Instruction
CNT = 0x01
Z =0
After Instruction
CNT = 0x00
Z =1
DS40044A-page 116
Preliminary
 2002 Microchip Technology Inc.
|
▷ |