PIC18F1220_07 Datasheet, PDF (214/308 Pages) Microchip Technology – 18/20/28-Pin High-Performance, Enhanced Flash Microcontrollers with 10-bit A/D and nanoWatt Technology

PIC18F1220/1320
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 the 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
Q3
Q4
Decode
Read
register ‘f’
Process
Data
Write to
destination
Example:
INCF
CNT
Before Instruction
CNT
Z
C
DC
= 0xFF
=0
=?
=?
After Instruction
CNT
Z
C
DC
= 0x00
=1
=1
=1
DS39605F-page 212
© 2007 Microchip Technology Inc.