Datasheet

PIC14000
DS40122B-page 100 Preliminary  1996 Microchip Technology Inc.
RETURN Return from Subroutine
Syntax: [
label ] RETURN
Operands: None
Operation: TOS → PC
Status Affected: None
Encoding:
00 0000 0000 1000
Description:
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.
Words: 1
Cycles: 2
Example
RETURN
After Interrupt
PC = TOS
RLF Rotate Left f through Carry
Syntax: [
label ] RLF f,d
Operands: 0 ≤ f ≤ 127
d ∈ [0,1]
Operation: See description below
Status Affected: C
Encoding:
00 1101 dfff ffff
Description:
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'.
Words: 1
Cycles: 1
Example
RLF REG1,0
Before Instruction
REG1 = 1110 0110
C =0
After Instruction
REG1 = 1110 0110
W = 1100 1100
C =1
Register fC
RRF Rotate Right f through Carry
Syntax: [
label ] RRF f,d
Operands: 0 ≤ f ≤ 127
d ∈ [0,1]
Operation: See description below
Status Affected: C
Encoding:
00 1100 dfff ffff
Description:
The contents of register 'f' are rotated
one bit to the right through the Carry
Flag. If 'd' is 0 the result is placed in
the W register. If 'd' is 1 the result is
placed back in register 'f'.
Words: 1
Cycles: 1
Example
RRF REG1,0
Before Instruction
REG1 = 1110 0110
C =0
After Instruction
REG1 = 1110 0110
W = 0111 0011
C =0
SLEEP
Syntax: [ label ] SLEEP
Operands: None
Operation: 00h → WDT,
0 → WDT prescaler,
1 → T
O,
0 → PD
Status Affected: TO, PD
Encoding:
00 0000 0110 0011
Description:
The power-down status bit, PD is
cleared. Time-out status bit, TO is
set. Watchdog Timer and its pres-
caler are cleared.
The processor is put into SLEEP
mode with the oscillator stopped.
See Section 10.8 for more details.
Words: 1
Cycles: 1
Example: SLEEP
Register fC