PIC17C756A MICROCHIP [Microchip Technology], PIC17C756A Datasheet - Page 206

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

PIC17C7XX
BTFSS
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
If skip:
Example:
DS30289B-page 206
Before Instruction
After Instruction
operation
Decode
PC
If FLAG<1>
If FLAG<1>
Q1
Q1
No
PC
PC
Bit Test, skip if Set
[ label ] BTFSS f,b
0
0
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 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 < 7
127
address (HERE)
0;
address (FALSE)
1;
address (TRUE)
BTFSS
:
:
0bbb
operation
Process
Data
Q3
Q3
No
FLAG,1
ffff
operation
operation
Q4
Q4
No
No
ffff
BTG
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Example:
Before Instruction:
After Instruction:
Decode
PORTC =
PORTC =
Q1
register ’f’
Bit Toggle f
[ label ] BTG f,b
0
0
(f<b>)
None
Bit ’b’ in data memory location ’f’ is
inverted.
1
1
BTG
Read
0011
Q2
0111 0101 [0x75]
0110 0101 [0x65]
f
b < 7
2000 Microchip Technology Inc.
255
PORTC,
(f<b>)
1bbb
Process
Data
Q3
4
ffff
register ’f’
Write
Q4
ffff