PIC16F627A-I/P Microchip Technology Inc., PIC16F627A-I/P Datasheet - Page 119

• Manufacturer Part Number: PIC16F627A-I/P
• Description: 18 PIN, 1.75 KB FLASH, 224 RAM, 16 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F627A-I/P

• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 128 Bytes
• Input Output: 16
• Interface: SCI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 18-pin PDIP
• Programmable Memory: 1.75K Bytes
• Ram Size: 224 Bytes
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

 2003 Microchip Technology Inc.
RETLW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
RETURN
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
TABLE
Return with Literal in W
[ label ]
0 ≤ k ≤ 255
k → (W);
TOS → PC
None
11
The W register is loaded with
the eight bit literal 'k'. The
program counter is loaded from
the top of the stack (the return
address). This is a two-cycle
instruction.
1
2
CALL TABLE;W contains table
•
value
•
•
ADDWF PC ;W = offset
RETLW k1 ;Begin table
RETLW k2 ;
•
•
•
RETLW kn
Before Instruction
After Instruction
Return from Subroutine
[ label ]
None
None
00
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
After Interrupt
TOS → PC
W = 0x07
W = value of k8
PC = TOS
01xx
0000
RETLW k
RETURN
;offset value
;W now has table
; End of table
kkkk
0000
kkkk
1000
Preliminary
RLF
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Rotate Left f through Carry
[ label ]
0 ≤ f ≤ 127
d ∈ [0,1]
See description below
C
00
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
Before Instruction
After Instruction
PIC16F62X
REG1 = 1110 0110
C
REG1 = 1110 0110
W
C
C
RLF
1101
REG1, 0
= 0
= 1100 1100
= 1
DS40300C-page 117
REGISTER F
f,d
dfff
ffff