Datasheet

Table Of Contents
PIC18F1220/1320
DS39605F-page 212 © 2007 Microchip Technology Inc.
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>)
1110
1111
1111
k
19
kkk
k
7
kkk
kkkk
kkkk
0
kkkk
8
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 Q3 Q4
Decode Read literal
‘k’<7:0>,
No
operation
Read literal
‘k’<19:8>,
Write to PC
No
operation
No
operation
No
operation
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’ is1’, the result
is placed back in register ‘f
(default). If ‘a’ is0’, 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 = 0xFF
Z=0
C=?
DC = ?
After Instruction
CNT = 0x00
Z=1
C=1
DC = 1