PIC17C756A MICROCHIP [Microchip Technology], PIC17C756A Datasheet - Page 205

• Manufacturer Part Number: PIC17C756A
• Description: High-Performance 8-bit CMOS EPROM Microcontrollers with 10-bit A/D
• Manufacturer: MICROCHIP [Microchip Technology]

BSF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Example:
2000 Microchip Technology Inc.
Before Instruction
After Instruction
Decode
FLAG_REG
FLAG_REG
Q1
register ’f’
Bit Set f
[ label ] BSF
0
0
1
None
Bit ’b’ in register ’f’ is set.
1
1
BSF
Read
1000
Q2
=
=
f
b
(f<b>)
255
7
0x0A
0x8A
FLAG_REG, 7
0bbb
Process
Data
Q3
f,b
ffff
register ’f’
Write
Q4
ffff
BTFSC
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
If skip:
Example:
Before Instruction
After Instruction
operation
Decode
PC
If FLAG<1>
If FLAG<1>
Q1
Q1
No
PC
PC
Bit Test, skip if Clear
[ label ] BTFSC f,b
0
0
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 exe-
cution is discarded and a NOP is executed
instead, making this a two-cycle
instruction.
1
1(2)
HERE
FALSE
TRUE
register 'f'
operation
1001
Read
Q2
Q2
=
=
=
=
=
No
f
b
PIC17C7XX
255
7
address (HERE)
0;
address (TRUE)
1;
address (FALSE)
BTFSC
:
:
1bbb
operation
Process
Data
DS30289B-page 205
Q3
Q3
No
FLAG,1
ffff
operation
operation
Q4
Q4
No
No
ffff