PIC16C926 Microchip Technology Inc., PIC16C926 Datasheet - Page 129

• Manufacturer Part Number: PIC16C926
• Description: 64/68-pin Cmos Microcontrollers With Lcd Driver
• Manufacturer: Microchip Technology Inc.

RETURN
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Example
2001 Microchip Technology Inc.
After Interrupt:
2nd Cycle
1st Cycle
PC =
TOS
Return from Subroutine
[ label ]
None
TOS
None
Return from subroutine. The stack is
POPed and the top of the stack (TOS)
is loaded into the program counter.
This is a two-cycle instruction.
1
2
RETURN
Operation
Decode
Q1
00
No
PC
RETURN
Operation
Operation
0000
Q2
No
No
Operation
Operation
0000
Q3
No
No
Pop from
the Stack
Operation
1000
Preliminary
Q4
No
RLF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Example
Before Instruction:
After Instruction:
REG1
C
REG1
W
C
PIC16C925/926
=
=
=
=
=
Rotate Left f through Carry
[ label ] RLF
0
d
See description below
C
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
the W register. If ’d’ is 1, the result is
stored back in register ’f’.
1
1
RLF
Decode
1110 0110
0
1110 0110
1100 1100
1
Q1
00
f
[0,1]
127
C
register
1101
Read
Q2
’f’
REG1,0
DS39544A-page 127
f [,d]
Register f
Process
dfff
data
Q3
destination
Write to
ffff
Q4