PIC17C7XX Datasheet, PDF (220/328 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM Microcontrollers with 10-bit A/D

PIC17C7XX
RETURN
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Q1
Decode
No
operation
Return from Subroutine
[ label ] RETURN
None
TOS → PC;
None
0000 0000 0000 0010
Return from subroutine. The stack is
popped and the top of the stack (TOS)
is loaded into the program counter.
1
2
Q2
No
operation
No
operation
Q3
Process
Data
No
operation
Q4
POP PC
from stack
No
operation
Example:
RETURN
After Interrupt
PC = TOS
RLCF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Rotate Left f through Carry
[ label ] RLCF f,d
0 ≤ f ≤ 255
d ∈ [0,1]
f<n> → d<n+1>;
f<7> → C;
C → d<0>
C
0001 101d ffff ffff
The contents of register 'f' are rotated
one bit to the left through the Carry
Flag. If 'd' is 0 the result is placed in
WREG. If 'd' is 1 the result is stored
back in register 'f'.
C
register f
Words:
1
Cycles:
1
Q Cycle Activity:
Q1
Decode
Q2
Read
register 'f'
Q3
Process
Data
Q4
Write to
destination
Example:
RLCF REG,0
Before Instruction
REG = 1110 0110
C
=0
After Instruction
REG =
WREG =
C
=
1110 0110
1100 1100
1
DS30289A-page 220
© 1998 Microchip Technology Inc.