Datasheet
1996 Microchip Technology Inc. DS30430B-page 61
PIC16F8X
GOTO Go to address
Syntax: [
label
] GOTO k
Operands: 0 ≤ k ≤ 2047
Operation: k → (PC<10:0>)
(PCLATH<4:3>) → (PC<12:11>)
Status Affected: None
Encoding:
10 1kkk kkkk kkkk
Description:
GOTO is an unconditional branch. The
eleven bit immediate value is loaded
into PC bits <10:0>. The upper bits of
PC are loaded from PCLATH<4:3>.
GOTO is a two cycle instruction.
Words: 1
Cycles: 2
Example
GOTO THERE
After Instruction
PC = Address THERE
INCF Increment f
Syntax: [
label
] INCF f,d
Operands: 0 ≤ f ≤ 127
d ∈ [0,1]
Operation: (f) + 1 → (dest)
Status Affected: Z
Encoding:
00 1010 dfff 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 ≤ 127
d ∈ [0,1]
Operation: (f) + 1 → (dest), skip if result = 0
Status Affected: None
Encoding:
00 1111 dfff 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, the next instruction,
which is already fetched, is discarded.
A NOP is executed instead making it
a two cycle instruction
.
Words: 1
Cycles: 1(2)
Example
HERE INCFSZ CNT,
1
GOTO LOOP
CONTINUE •
•
•
Before Instruction
PC = addressHERE
After Instruction
CNT = CNT + 1
if CNT = 0,
PC = addressCONTINUE
if CNT≠ 0,
PC = addressHERE +1
IORLW Inclusive OR Literal with W
Syntax: [
label
] IORLW k
Operands: 0 ≤ k ≤ 255
Operation: (W) .OR. (k) → (W)
Status Affected: Z
Encoding:
11 1000 kkkk kkkk
Description:
The contents of the W register are
OR’ed to 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