PIC18C658 MICROCHIP [Microchip Technology], PIC18C658 Datasheet - Page 274

• Manufacturer Part Number: PIC18C658
• Description: High-Performance Microcontrollers with CAN Module
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18CXX8
BTFSC
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
If skip:
If skip and followed by 2-word instruction:
Example:
DS30475A-page 274
Before Instruction
After Instruction
operation
operation
operation
Decode
PC
If FLAG<1>
If FLAG<1>
No
No
No
Q1
Q1
Q1
PC
PC
Bit Test File, Skip if Clear
[ label ] BTFSC f, b [,a]
0
0
a
skip if (f<b>) = 0
None
If bit 'b' in register ’f' is 0, then the
next instruction is skipped.
If bit 'b' is 0, then the next instruction
fetched during the current instruction
execution is discarded, and a NOP is
executed instead, 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.
1
1(2)
Note: 3 cycles if skip and followed
HERE
FALSE
TRUE
register ’f’
operation
operation
operation
Read
1011
No
No
No
Q2
Q2
Q2
=
=
=
=
=
f
b
[0,1]
by a 2-word instruction.
255
7
address (HERE)
0;
address (TRUE)
1;
address (FALSE)
BTFSC
:
:
bbba
operation
operation
operation
Process
Data
No
No
No
Q3
Q3
Q3
FLAG, 1, ACCESS
ffff
Advanced Information
operation
operation
operation
operation
No
No
No
No
Q4
Q4
Q4
ffff
BTFSS
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
If skip:
If skip and followed by 2-word instruction:
Example:
Before Instruction
After Instruction
operation
operation
operation
Decode
PC
If FLAG<1>
If FLAG<1>
No
No
No
Q1
Q1
Q1
PC
PC
Bit Test File, Skip if Set
[ label ] BTFSS f, b [,a]
0
0
a
skip if (f<b>) = 1
None
If bit 'b' in register 'f' is 1 then the next
instruction is skipped.
If bit 'b' is 1, then the next instruction
fetched during the current instruc-
tion execution, is discarded and an
NOP is executed instead, 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.
1
1(2)
Note: 3 cycles if skip and followed
register ’f’
HERE
FALSE
TRUE
operation
operation
operation
Read
1010
No
No
No
Q2
Q2
Q2
=
=
=
=
=
f
b < 7
[0,1]
by a 2-word instruction.
2000 Microchip Technology Inc.
255
address (HERE)
0;
address (FALSE)
1;
address (TRUE)
BTFSS
:
:
bbba
operation
operation
operation
Process
Data
No
No
No
Q3
Q3
Q3
FLAG, 1, ACCESS
ffff
operation
operation
operation
operation
No
No
No
No
Q4
Q4
Q4
ffff