PIC18F010T-I/SN View Datasheet(PDF) - Microchip Technology
Part Name
Description
MFG CO.
'PIC18F010T-I/SN' PDF : 176 Pages View PDF
PIC18F010/020
TSTFSZ
Test f, skip if 0
Syntax:
[ label ] TSTFSZ f [,a]
Operands:
0 ≤ f ≤ 255
a ∈ [0,1]
Operation:
skip if f = 0
Status Affected: None
Encoding:
0110 011a ffff ffff
Description:
If ’f’ = 0, the next instruction,
fetched during the current instruc-
tion execution, is discarded and a
NOP is executed making this a two-
cycle instruction. If ’a’ is 0, the
Access Bank will be selected, over-
riding the BSR value. If ’a’ is 1, the
Bank will be selected as per the
BSR value.
Words:
1
Cycles:
1(2)
Note: 3 cycles if skip and followed
by a 2-word instruction
Q Cycle Activity:
Q1
Q2
Q3
Decode
Read
register ’f’
Process
Data
If skip:
Q1
Q2
Q3
No
operation
No
operation
No
operation
If skip and followed by 2-word instruction:
Q1
Q2
Q3
No
operation
No
operation
No
operation
No
operation
No
operation
No
operation
Q4
No
operation
Q4
No
operation
Q4
No
operation
No
operation
Example:
HERE
NZERO
ZERO
TSTFSZ CNT
:
:
Before Instruction
PC
= Address (HERE)
After Instruction
If CNT
=
PC
=
If CNT
≠
PC
=
0x00,
Address (ZERO)
0x00,
Address (NZERO)
XORLW
Exclusive OR literal with WREG
Syntax:
[ label ] XORLW k
Operands:
0 ≤ k ≤ 255
Operation:
(WREG) .XOR. k → WREG
Status Affected: N,Z
Encoding:
0000 1010 kkkk kkkk
Description:
The contents of WREG are
XOR’ed with the 8-bit literal 'k'.
The result is placed in WREG.
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Q2
Decode
Read
literal ’k’
Q3
Process
Data
Q4
Write to
WREG
Example:
XORLW 0xAF
Before Instruction
WREG = 0xB5
N
=?
Z
=?
After Instruction
WREG =
N
=
Z
=
0x1A
0
0
2001 Microchip Technology Inc.
Preliminary
DS41142A-page 137
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