PIC16F627A_05 Datasheet, PDF (124/180 Pages) Microchip Technology – Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F627A/628A/648A
INCF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Increment f
[ label ] INCF f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(f) + 1 → (dest)
Z
00
1010 dfff ffff
The contents of register ‘f’ are
incremented. If ‘d’ is ‘0’, the
result is placed in the W register.
If ‘d’ is ‘1’, the result is placed
back in register ‘f’.
1
1
INCF REG1, 1
Before Instruction
REG1 = 0xFF
Z =0
After Instruction
REG1 = 0x00
Z =1
INCFSZ
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Increment f, Skip if 0
[ label ] INCFSZ f,d
0 ≤ f ≤ 127
d ∈ [0,1]
(f) + 1 → (dest), skip if result = 0
None
00
1111 dfff ffff
The contents of register ‘f’ are
incremented. 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
INCFSZ
GOTO
CONTINUE •
•
•
REG1, 1
LOOP
Before Instruction
PC = address HERE
After Instruction
REG1 = REG1 + 1
if CNT = 0,
PC = address CONTINUE
if REG1≠ 0,
PC = address HERE +1
DS40044D-page 122
© 2005 Microchip Technology Inc.