PIC16C64A/JW Microchip Technology, PIC16C64A/JW Datasheet - Page 154

• Manufacturer Part Number: PIC16C64A/JW
• Description: IC MCU EPROM 2KX14 PWM 40CDIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C64A/JW

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: EPROM, UV
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-CDIP (0.600", 15.24mm) Window
• For Use With: 444-1001 - DEMO BOARD FOR PICMICRO MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Other names: PIC16C64A/JWR; PIC16C64A/JWR

PIC16C6X
RETLW
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Example
DS30234D-page 154
2nd Cycle
1st Cycle
TABLE
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
•
•
•
ADDWF PC
RETLW k1
RETLW k2
•
•
•
RETLW kn
Before Instruction
After Instruction
Operation
Decode
Q1
11
No-
k
(W);
255
PC
W
W
RETLW k
Operation
literal 'k'
01xx
Read
;W contains table
;offset value
;W now has table value
;W = offset
;Begin table
;
; End of table
Q2
No-
=
=
0x07
value of k8
Operation
Operation
kkkk
Q3
No-
No-
Write to W,
Operation
the Stack
Pop from
kkkk
Q4
No-
RETURN
Syntax:
Operands:
Operation:
Status Affected:
Encoding:
Description:
Words:
Cycles:
Q Cycle Activity:
Example
2nd Cycle
1st Cycle
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
After Interrupt
Operation
RETURN
Decode
Q1
00
No-
1997 Microchip Technology Inc.
PC
PC =
RETURN
Operation
Operation
0000
Q2
No-
No-
TOS
Operation
Operation
0000
Q3
No-
No-
Operation
the Stack
Pop from
1000
Q4
No-