Datasheet

 1999 Microchip Technology Inc. DS40139E-page 53
PIC12C5XX
INCF Increment f
Syntax: [
label ] INCF f,d
Operands: 0 ≤ f ≤ 31
d ∈ [0,1]
Operation: (f) + 1 → (dest)
Status Affected: Z
Encoding:
0010 10df ffff
Description:
The contents of register ’f’ are incre-
mented. If ’d’ is 0 the result is placed in
the W register. If ’d’ is 1 the result is
placed back in register ’f’.
Words: 1
Cycles: 1
Example:
INCF CNT,
1
Before Instruction
CNT = 0xFF
Z=0
After Instruction
CNT = 0x00
Z=1
INCFSZ Increment f, Skip if 0
Syntax: [
label ] INCFSZ f,d
Operands: 0 ≤ f ≤ 31
d ∈ [0,1]
Operation: (f) + 1 → (dest), skip if result = 0
Status Affected: None
Encoding:
0011 11df ffff
Description:
The contents of register ’f’ are incre-
mented. 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, then the next instruc-
tion, which is already fetched, is dis-
carded and an NOP is executed
instead making it a two cycle instruc-
tion.
Words: 1
Cycles: 1(2)
Example:
HERE INCFSZ CNT, 1
GOTO LOOP
CONTINUE •
•
•
Before Instruction
PC = address (HERE)
After Instruction
CNT = CNT + 1;
if CNT = 0,
PC = address (CONTINUE);
if CNT ≠ 0,
PC = address (HERE +1)
IORLW Inclusive OR literal with W
Syntax: [
label ] IORLW k
Operands: 0 ≤ k ≤ 255
Operation: (W) .OR. (k) → (W)
Status Affected: Z
Encoding:
1101 kkkk kkkk
Description:
The contents of the W register are
OR’ed with the eight bit literal 'k'. The
result is placed in the W register.
Words: 1
Cycles: 1
Example:
IORLW 0x35
Before Instruction
W = 0x9A
After Instruction
W= 0xBF
Z=0
IORWF Inclusive OR W with f
Syntax: [
label ] IORWF f,d
Operands: 0 ≤ f ≤ 31
d ∈ [0,1]
Operation: (W).OR. (f) → (dest)
Status Affected: Z
Encoding:
0001 00df ffff
Description:
Inclusive OR the W register with regis-
ter 'f'. If 'd' is 0 the result is placed in
the W register. If 'd' is 1 the result is
placed back in register 'f'.
Words: 1
Cycles: 1
Example:
IORWF RESULT, 0
Before Instruction
RESULT = 0x13
W = 0x91
After Instruction
RESULT = 0x13
W = 0x93
Z=0