PIC18F2331_07 Datasheet, PDF (312/400 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D

PIC18F2331/2431/4331/4431
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>)
2nd word(k<19:8>)
Description:
1110 1111 k₇kkk kkkk₀
1111 k₁₉kkk kkkk kkkk₈
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
Decode
Q2
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
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Q1
Decode
Increment f
[ label ] INCF f [,d [,a]]
0 ≤ f ≤ 255
d ∈ [0,1]
a ∈ [0,1]
(f) + 1 → dest
C, DC, N, OV, Z
0010 10da ffff ffff
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).
1
1
Q2
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,
DS39616C-page 310
Preliminary
© 2007 Microchip Technology Inc.