PIC18F2331-E/ML MICROCHIP [Microchip Technology], PIC18F2331-E/ML Datasheet - Page 296

• Manufacturer Part Number: PIC18F2331-E/ML
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2331/2431/4331/4431
BTFSC
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
DS39616D-page 296
Q Cycle Activity:
If skip:
If skip and followed by 2-word instruction:
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  f  255
0  b  7
a [0,1]
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, overriding the BSR
value. If ‘a’ = 1, then the bank will be
selected as per the BSR value.
1
1(2)
Note:
register ‘f’
HERE
FALSE
TRUE
operation
operation
operation
Read
1011
No
No
No
=
=
=
=
=
Q2
Q2
Q2
address (HERE)
0;
address (TRUE)
1;
address (FALSE)
3 cycles if skip and followed
by a 2-word instruction.
BTFSC
:
:
bbba
operation
operation
operation
Process
Data
No
No
No
Q3
Q3
Q3
FLAG, 1
ffff
operation
operation
operation
operation
No
No
No
No
Q4
Q4
Q4
ffff
BTFSS
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
Q Cycle Activity:
If skip:
If skip and followed by 2-word instruction:
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  f  255
0  b < 7
a [0,1]
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 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, overriding the BSR
value. If ‘a’ = 1, then the bank will be
selected as per the BSR value.
1
1(2)
Note:
register ‘f’
HERE
FALSE
TRUE
operation
operation
operation
Read
1010
No
No
No
=
=
=
=
=
Q2
Q2
Q2
 2010 Microchip Technology Inc.
address (HERE)
0;
address (FALSE)
1;
address (TRUE)
3 cycles if skip and followed
by a 2-word instruction.
BTFSS
:
:
bbba
operation
operation
operation
Process
Data
No
No
No
Q3
Q3
Q3
FLAG, 1
ffff
operation
operation
operation
operation
No
No
No
No
Q4
Q4
Q4
ffff