PIC16F57 Microchip Technology Inc., PIC16F57 Datasheet - Page 49

• Manufacturer Part Number: PIC16F57
• Description: Flash-based, 8-bit Cmos Microcontroller Series
• Manufacturer: Microchip Technology Inc.

GOTO
Syntax:
Operands:
Operation:
Status Affected: None
Encoding:
Description:
Words:
Cycles:
Example:
INCF
Syntax:
Operands:
Operation:
Status Affected: Z
Encoding:
Description:
Words:
Cycles:
Example:
© 2007 Microchip Technology Inc.
After Instruction
Before Instruction
After Instruction
PC
CNT
Z
CNT
Z
=
Unconditional Branch
[ label ]
0 ≤ k ≤ 511
k → PC<8:0>;
STATUS<6:5> → PC<10:9>
GOTO is an unconditional branch.
The 9-bit immediate value is
loaded into PC bits <8:0>. The
upper bits of PC are loaded from
STATUS<6:5>. GOTO is a two-
cycle instruction.
1
2
GOTO THERE
Increment f
[ label ]
0 ≤ f ≤ 31
d ∈ [0,1]
(f) + 1 → (dest)
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
=
=
=
=
101k
0010
address (THERE)
0xFF
0
0x00
1
CNT,
GOTO k
INCF f, d
kkkk
10df
1
kkkk
ffff
INCFSZ
Syntax:
Operands:
Operation:
Status Affected: None
Encoding:
Description:
Words:
Cycles:
Example:
Before Instruction
After Instruction
PC
CNT
if CNT
PC
if CNT
PC
[ label ]
0 ≤ f ≤ 31
d ∈ [0,1]
(f) + 1 → (dest), skip if result = 0
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’, then
the next instruction, which is
already fetched, is discarded and
a NOP is executed instead making
it a two-cycle instruction.
1
1(2)
HERE
CONTINUE •
Increment f, Skip if 0
0011
=
=
=
=
≠
=
address (HERE)
CNT + 1;
0,
address (CONTINUE);
0,
address (HERE +1)
INCFSZ f, d
11df
PIC16F5X
INCFSZ
GOTO
•
•
DS41213D-page 47
ffff
LOOP
CNT, 1