CONFIG
The __CONFIG statement at the start of the code is used to control the
Configuration Fuse register. This is a special location that controls how the chip operates. Things like Oscillator Type, Watch Dog Timer, Programming Mode and other features. These are listed in the data sheets. The value used...
__CONFIG 0x3FFB
... is a specially selected value for this project. It selects RC Oscillator, Watch Dog Disabled and no Code Protection.
RC mode was selected because the PIC clock source connected to the demonstration socket is a simple Resistor/Capacitor circuit.
Please do not alter this value as the PIC may stop operating when you run the code. If you accidently changed the value, change it back and reassemble. After programming again, the chip should run normally.
Cheers and happy programming.
DIY K81 Project - Page 43
PARTS LIST
Used |
Part Type |
Designators |
Description |
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SEMICONDUCTORS |
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1 |
PIC16F84A |
IC4 |
PIC Processor |
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1 |
74LS07 |
IC3 |
HEX OC buffer |
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1 |
78L05 |
IC1 |
Regulator |
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1 |
78L08 |
IC2 |
Regulator |
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2 |
BC557 |
Q1, Q2 |
PNP Transistor |
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1 |
W02 |
B1 |
Bridge Rectifier |
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1 |
RB2 |
L2 |
5mm LED |
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1 |
RB3 |
L3 |
5mm LED |
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1 |
RB4 |
L4 |
5mm LED |
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1 |
RB5 |
L5 |
5mm LED |
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1 |
RB6 |
L6 |
5mm LED |
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1 |
Program /Verify |
L1 |
5mm LED |
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RESISTORS all 1/4W 5% |
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1 |
SIP 10K |
SIL1 |
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1 |
SIP 1K |
SIL2 |
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1 |
1K |
R1 |
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2 |
3K3 |
R3, R6 |
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1 |
3K9 |
R8 |
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4 |
10K |
R2, R4, R5, R7 |
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CAPACITORS |
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1 |
330p |
C6 |
Ceramic |
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1 |
22p |
C5 |
Ceramic |
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3 |
100N |
C1, C2, C4 |
Ceramic |
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1 |
470uF |
C3 |
Electrolytic 35V |
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MISCELLANEOUS |
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1 |
BLANK PCB |
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PCB1 |
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2 |
IC SOCKET |
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18 pin |
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1 |
IC SOCKET |
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14 pin |
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1 |
PARALLEL |
CN1 |
Male RA DB25 |
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1 |
JACK |
JK1 |
3 Pin Power Jack |
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DIY K81 Project - Page 44
1 |
2 |
3 |
4 |
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IC1 |
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IC2 |
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78L08 |
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1 |
BR1 |
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78L05 |
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D |
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1 |
Vin |
Vout |
3 |
VPP |
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JK1 |
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GND |
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1 |
4 |
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2 |
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1 |
Vin |
Vout |
3 |
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VCC |
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2 |
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GND |
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2 |
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3 |
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JACK |
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W02 |
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C3 |
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C1 |
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C4 |
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3 |
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470uF |
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100N |
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100N |
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GND |
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J1 |
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DB25 |
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C |
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13 |
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25 GND |
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IC3A |
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12 |
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7407 |
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1 |
2 |
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21 |
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8 |
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SIL2 |
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20 |
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IC3F |
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7 |
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19 |
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1K |
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6 |
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VCC |
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18 |
13 |
12 |
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5 |
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16 |
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IC3B |
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R8 |
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3 |
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14 |
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15 |
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3K9 |
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IC4 |
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2 |
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B |
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14 |
3 |
4 |
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MCLR VCC |
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1 |
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L1 |
L2 |
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L3 |
L4 |
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L5 |
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4 |
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16 |
OSC1 |
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RB0 |
6 |
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IC3E |
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15 |
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7 |
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OSC2 |
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RB1 |
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8 |
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17 |
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RB2 |
9 |
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VCC |
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RA0 |
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RB3 |
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18 |
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10 |
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11 |
10 |
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RA1 |
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RB4 |
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1 |
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11 |
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RA2 |
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RB5 |
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2 |
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12 |
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RA3 |
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RB6 |
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3 |
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13 |
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RA4 |
Gnd |
RB7 |
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IC3D |
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C5 |
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16F84 |
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R7 |
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5 |
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22p |
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TEST CIRCUIT |
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8 |
9 |
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10K |
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GND |
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IC3C |
A |
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VDD |
5 |
6 |
1 |
2 |
3 |
4 |
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5 |
6 |
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D |
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VCC |
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VPP |
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R5 |
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R2 |
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10K |
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10K |
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Q2 |
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Q1 |
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BC557 |
BC557 |
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R6 |
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R3 |
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3K3 |
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3K3 |
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C |
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VDD |
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14 |
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IC5 |
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L6 |
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VCC |
MCLR |
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1 |
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4 |
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6 |
RB0 |
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OSC1 |
16 |
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SIL1 |
7 |
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15 |
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RB1 |
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OSC2 |
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8 |
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R1 |
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10K |
9 |
RB2 |
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17 |
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RB3 |
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RA0 |
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10 |
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18 |
R4 |
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1K |
4 3 2 |
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11 |
RB4 |
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RA1 |
1 |
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12 |
RB5 |
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RA2 |
2 |
10K |
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13 |
RB6 |
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RA3 |
3 |
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RB7 |
Gnd |
RA4 |
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16F84 |
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5 |
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B |
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GND |
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VDD |
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C6 |
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C2 |
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100N |
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330p |
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GND |
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A |
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Title |
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Size |
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Number |
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Revision |
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B |
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7407 |
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Date: |
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Sheet of |
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22-Nov-2002 |
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File: |
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C:\DIYPRO~1\K81\KIT81.SCH |
Drawn By: |
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5 |
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6 |
