PIC12C671-04I/P Microchip Technology Inc., PIC12C671-04I/P Datasheet - Page 78

• Manufacturer Part Number: PIC12C671-04I/P
• Description: 8 PIN, 1.75 KB OTP, 128 RAM, 6 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC12C671-04I/P

• A/d Inputs: 4-Channel, 8-Bit
• Cpu Speed: 2.5 MIPS
• Eeprom Memory: 0 Bytes
• Input Output: 5
• Memory Type: OTP
• Number Of Bits: 8
• Package Type: 8-pin PDIP
• Programmable Memory: 1.75K Bytes
• Ram Size: 128 Bytes
• Speed: 4 MHz
• Timers: 1-8-bit
• Voltage, Range: 2.5-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC12C67X
NOP
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
DS30561B-page 78
OPTION
No Operation
[ label ]
None
No operation
None
No operation.
1
1
Load Option Register
[ label ]
None
(W)
None
The contents of the W register are
loaded in the OPTION register.
This instruction is supported for
code compatibility with PIC16C5X
products. Since OPTION is a read-
able/writable register, the user can
directly address it.
1
1
To maintain upward compatibility
with future PIC12C67X products,
do not use this instruction.
NOP
00
00
OPTION
NOP
OPTION
0000
0000
0110
0xx0
0010
0000
RETFIE
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
RETLW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Example
TABLE
Return from Interrupt
[ label ]
None
TOS
1
None
Return from Interrupt. Stack is
POPed and Top of Stack (TOS) is
loaded in the PC. Interrupts are
enabled by setting Global Inter-
rupt Enable bit, GIE
(INTCON<7>). This is a two cycle
instruction.
1
2
After Interrupt
Return with Literal in W
[ label ]
0
k
TOS
None
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
•
•
•
ADDWF PC
RETLW k1
RETLW k2
•
•
•
RETLW kn
Before Instruction
After Instruction
RETFIE
00
11
k
GIE
(W);
1999 Microchip Technology Inc.
255
;offset value
PC,
PC
;W now has table value
PC =
GIE =
W
W
RETFIE
RETLW k
0000
01xx
;Begin table
;
; End of table
=
=
;W = offset
TOS
1
0x07
value of k8
0000
kkkk
1001
kkkk