PIC18C242 MICROCHIP [Microchip Technology], PIC18C242 Datasheet - Page 204

• Manufacturer Part Number: PIC18C242
• Description: High-Performance Microcontrollers with 10-Bit A/D
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18CXX2
BTFSC
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
If skip:
If skip and followed by 2-word instruction:
Example:
DS39026B-page 204
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’ = 1, then
the bank will be selected as per the
BSR value (default).
1
1(2)
Note: 3 cycles if skip and followed
by a 2-word instruction
HERE
FALSE
TRUE
register ’f’
operation
operation
operation
Read
1011
No
No
No
Q2
Q2
Q2
=
=
=
f
b
[0,1]
255
7
address (HERE)
0;
address (TRUE)
1;
address (FALSE)
BTFSC
:
:
Process Data
bbba
operation
operation
operation
Q3
Q3
No
Q3
No
No
FLAG, 1, 0
ffff
operation
operation
operation
operation
No
No
No
No
Q4
Q4
Q4
ffff
Preliminary
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’ = 1, then
the bank will be selected as per the
BSR value (default).
1
1(2)
Note: 3 cycles if skip and followed
by a 2-word instruction
register ’f’
HERE
FALSE
TRUE
operation
operation
operation
Read
1010
No
No
No
Q2
Q2
Q2
=
=
=
f
b < 7
[0,1]
255
7/99 Microchip Technology Inc.
address (HERE)
0;
address (FALSE)
1;
address (TRUE)
BTFSS
:
:
Process Data
bbba
operation
operation
operation
No
No
No
Q3
Q3
Q3
FLAG, 1, 0
ffff
operation
operation
operation
operation
No
No
No
No
Q4
Q4
Q4
ffff