PIC16C621A Microchip Technology Inc., PIC16C621A Datasheet - Page 66

• Manufacturer Part Number: PIC16C621A
• Description: Eprom-based 8-bit Cmos Microcontrollers
• Manufacturer: Microchip Technology Inc.

PIC16C62X
BCF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
BSF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
DS30235J-page 64
Bit Clear f
[ label ] BCF
0 ≤ f ≤ 127
0 ≤ b ≤ 7
0 → (f<b>)
None
Bit 'b' in register 'f' is cleared.
1
1
Before Instruction
After Instruction
Bit Set f
[ label ] BSF
0 ≤ f ≤ 127
0 ≤ b ≤ 7
1 → (f<b>)
None
Bit 'b' in register 'f' is set.
1
1
Before Instruction
After Instruction
01
BCF
01
BSF
FLAG_REG = 0xC7
FLAG_REG = 0x47
FLAG_REG = 0x0A
FLAG_REG = 0x8A
00bb
FLAG_REG, 7
01bb
FLAG_REG,
f,b
f,b
bfff
bfff
7
ffff
ffff
BTFSC
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Bit Test, Skip if Clear
[ label ] BTFSC f,b
0 ≤ f ≤ 127
0 ≤ b ≤ 7
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 instruc-
tion fetched during the current
instruction execution is discarded,
and a NOP is executed instead,
making this a two-cycle instruction.
1
1(2)
Before Instruction
After Instruction
HERE
FALSE
TRUE
01
 2003 Microchip Technology Inc.
PC =
if FLAG<1> = 0,
PC =
if FLAG<1>=1,
PC =
10bb
BTFSC
GOTO
•
•
•
address HERE
address TRUE
address FALSE
FLAG,1
PROCESS_CO
DE
bfff
ffff