PIC16F628-20P Datasheet, PDF (120/170 Pages) Microchip Technology – FLASH-Based 8-Bit CMOS Microcontroller

PIC16F62X
RRF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Rotate Right f through Carry
[ label ] RRF f,d
0 ≤ f ≤ 127
d ∈ [0,1]
See description below
C
00
1100 dfff ffff
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'.
C
REGISTER F
Words:
Cycles:
Example
1
1
RRF
REG1, 0
Before Instruction
REG1 = 1110 0110
C =0
After Instruction
REG1 = 1110 0110
W = 0111 0011
C =0
SLEEP
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example:
[ label ] SLEEP
None
00h → WDT,
0 → WDT prescaler,
1 → TO,
0 → PD
TO, PD
00
0000 0110 0011
The power-down STATUS bit,
PD is cleared. Timeout
STATUS bit, TO is set.
Watchdog Timer and its
prescaler are cleared.
The processor is put into
SLEEP mode with the
oscillator stopped. See
Section 14.9 for more details.
1
1
SLEEP
SUBLW
Syntax:
Operands:
Operation:
Status
Affected:
Encoding:
Description:
Words:
Cycles:
Example 1:
Example 2:
Example 3:
Subtract W from Literal
[ label ] SUBLW k
0 ≤ k ≤ 255
k - (W) → (W)
C, DC, Z
11
110x kkkk kkkk
The W register is subtracted (2’s
complement method) from the eight
bit literal 'k'. The result is placed in
the W register.
1
1
SUBLW 0x02
Before Instruction
W=1
C =?
After Instruction
W= 1
C = 1; result is positive
Before Instruction
W= 2
C=?
After Instruction
W= 0
C = 1; result is zero
Before Instruction
W= 3
C= ?
After Instruction
W = 0xFF
C = 0; result is negative
DS40300C-page 118
Preliminary
 2003 Microchip Technology Inc.