PIC18F2221 MICROCHIP [Microchip Technology], PIC18F2221 Datasheet - Page 315

• Manufacturer Part Number: PIC18F2221
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

TSTFSZ
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
© 2007 Microchip Technology Inc.
Q Cycle Activity:
If skip:
If skip and followed by 2-word instruction:
Before Instruction
After Instruction
operation
operation
operation
Decode
PC
If CNT
PC
If CNT
PC
Q1
Q1
No
Q1
No
No
register ‘f’
operation
operation
operation
Test f, Skip if 0
TSTFSZ f {,a}
0 ≤ f ≤ 255
a ∈ [0,1]
skip if f = 0
None
If ‘f’ = 0, the next instruction fetched
during the current instruction execution
is discarded and a NOP is executed,
making this a two-cycle instruction.
If ‘a’ is ‘0’, the Access Bank is selected.
If ‘a’ is ‘1’, the BSR is used to select the
GPR bank (default).
If ‘a’ is ‘0’ and the extended instruction
set is enabled, this instruction operates
in Indexed Literal Offset Addressing
mode whenever f ≤ 95 (5Fh). See
Section 24.2.3 “Byte-Oriented and
Bit-Oriented Instructions in Indexed
Literal Offset Mode” for details.
1
1(2)
Note: 3 cycles if skip and followed
HERE
NZERO
ZERO
Read
0110
Q2
Q2
No
Q2
No
No
=
=
=
≠
=
by a 2-word instruction.
Address (HERE)
00h,
Address (ZERO)
00h,
Address (NZERO)
TSTFSZ
:
:
011a
operation
operation
operation
Process
Data
Q3
Q3
No
Q3
No
No
CNT, 1
ffff
operation
operation
operation
operation
Q4
Q4
Q4
No
No
No
No
ffff
Preliminary
XORLW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
Q Cycle Activity:
PIC18F4321 FAMILY
Before Instruction
After Instruction
Decode
W
W
Q1
=
=
literal ‘k’
Exclusive OR Literal with W
XORLW k
0 ≤ k ≤ 255
(W) .XOR. k → W
N, Z
The contents of W are XORed with
the 8-bit literal ‘k’. The result is placed
in W.
1
1
XORLW
Read
Q2
0000
B5h
1Ah
0AFh
1010
Process
Data
Q3
DS39689E-page 313
kkkk
Write to W
Q4
kkkk