PIC16F627A_05 Datasheet, PDF (120/180 Pages) Microchip Technology – Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F627A/628A/648A
BCF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Bit Clear f
[ label ] BCF f,b
0 ≤ f ≤ 127
0≤b≤7
0 → (f<b>)
None
01
00bb bfff ffff
Bit ‘b’ in register ‘f’ is cleared.
1
1
BCF
REG1, 7
Before Instruction
REG1 = 0xC7
After Instruction
REG1 = 0x47
BSF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Bit Set f
[ label ] BSF f,b
0 ≤ f ≤ 127
0≤b≤7
1 → (f<b>)
None
01
01bb bfff ffff
Bit ‘b’ in register ‘f’ is set.
1
1
BSF
REG1, 7
Before Instruction
REG1 = 0x0A
After Instruction
REG1 = 0x8A
BTFSC
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Bit Test f, Skip if Clear
[ label ] BTFSC f,b
0 ≤ f ≤ 127
0≤b≤7
skip if (f<b>) = 0
None
01
10bb bfff ffff
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.
1
1(2)
HERE
FALSE
TRUE
BTFSC
GOTO
•
•
•
REG1
PROCESS_CODE
Before Instruction
PC = address HERE
After Instruction
if REG<1> = 0,
PC = address TRUE
if REG<1> =1,
PC = address FALSE
DS40044D-page 118
© 2005 Microchip Technology Inc.