PIC18F4539 Datasheet, PDF (234/322 Pages) Microchip Technology – Enhanced FLASH Microcontrollers with Single Phase Induction Motor Control Kernel

PIC18FXX39
GOTO
Unconditional Branch
Syntax:
[ label ] GOTO k
Operands:
0 ≤ k ≤ 1048575
Operation:
k → PC<20:1>
Status Affected: None
Encoding:
1st word (k<7:0>) 1110
2nd word(k<19:8>) ¹¹¹¹
1111 k₇kkk
k₁₉kkk kkkk
kkkk₀
kkkk₈
Description:
GOTO allows an unconditional
branch anywhere within entire
2 Mbyte memory range. The 20-bit
value ‘k’ is loaded into PC<20:1>.
GOTO is always a two-cycle
instruction.
Words:
2
Cycles:
2
Q Cycle Activity:
Q1
Q2
Decode
Read literal
'k'<7:0>,
No
operation
No
operation
Q3
No
operation
No
operation
Q4
Read literal
’k’<19:8>,
Write to PC
No
operation
Example:
GOTO THERE
After Instruction
PC = Address (THERE)
INCF
Increment f
Syntax:
[ label ] INCF f [,d [,a]
Operands:
0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
Operation:
(f) + 1 → dest
Status Affected: C, DC, N, OV, Z
Encoding:
0010 10da ffff ffff
Description:
The contents of register 'f' are
incremented. If 'd' is 0, the result is
placed in W. If 'd' is 1, the result is
placed back in register 'f' (default).
If ‘a’ is 0, the Access Bank will be
selected, overriding the BSR value.
If ‘a’ = 1, then the bank will be
selected as per the BSR value
(default).
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Q2
Decode
Read
register 'f'
Q3
Process
Data
Q4
Write to
destination
Example:
INCF
Before Instruction
CNT
Z
C
DC
= 0xFF
=0
=?
=?
After Instruction
CNT
Z
C
DC
= 0x00
=1
=1
=1
CNT, 1, 0
DS30485A-page 232
Preliminary
 2002 Microchip Technology Inc.