MCS51 Training board Model CATC2016A

Design by Arkhom JODTANGGround Instructor at CATC, Thailand

Schematic Diagram

Reset Circuit and Crystal

LED Row Display, EA pin

Input Switch

External connectionOpen Collector pin

7-Segment Display

PCB (Print Circuit Board)

Top Layer Components

PCB with Components

BOM (Bill of Material)

No.

Devices Quantity

Part Ref. Note:

1 USB Type B terminal female 1 J12 CPU MCS51 Family 1 U1 Such as AT89C52, AT89C513 Zif Socket 40 Pins 1 (U1)4 LED Green 3mm. Or 5mm. ( LED) 1 D Power for Power status display5 LED Red (Display LED) 8 D0 – D7 8 for Row display and 1 for Power status display6 Resistor Pack, 8 + 1 Common, 330 Ohms 1 RP 1 Make sure that: It have 9 pins7 Resistor 330 Ohms 1/4 W. 1 R LED R for Power status display8 Resistor 560 Ohms - 1kOhms 1/4 W. 2 R2, R3 R for 7-Segment display9 Electrolytic Capacitor 10 uF 1 C110 Resistor 8.2 kOhms 1/4 W. 1 R Pulldown Pull-down for reset pin11 Push Button Switch 1 SW RESET 1 for Reset12 Push Button Switch 1 SW LT 1 for Lamp test 13 Push Button Switch 8 SW0 – SW7 8 for Input Switch14 Crystal 11.059 MHz 1 X115 Capacitor Ceramic 33pF 2 C2, C316 IC 7447 (for Common-Anode 7-Segment) 1 U2 Or 7448 if use Common-C on 7-Segment117 7-Segment Common-A, 1 Digit, size 1/2 inch 1 7-Segment1 https://www.circuitspecialists.com/pdf/SC56-11EWA.pdf18 7-Segment Common-A, 1 Digit, size 1/2 inch 1 7-Segment2 (Optional)19 Straight Single Row 8-Pins Header, 2.54mm 3 J2, J3, J420 Straight Single Row 3-Pins Header, 2.54mm 2 JP1, JP2

Other Material and Tools

Copper clad PCB board, 4X5 inches PCB Etching Acid (or Ferric Chloride or Etching Solution) Drill bits (0.8, 1.0, 1.2 and 1.6 mm) USB Cable (Type A Male to Type B Male) Transparent Printing film (or Glossy Photo Paper) Permanent marker

Drilling size

1.6 mm. for USB Terminal Ground pin 1.2 mm. for Zip Socket 40 pin 1.0 mm. for Single Row connector pin 0.8 mm. for Normal other devices pin

Image from: www.aliexpress.com

Mark 5% (Complete Microcontroller Board)Mark 5% (Small Coding Project on your board)Write your Name (First letter of name and

surname) and ID (Last 4 digits) to Copper side. Such as,◦AJ0007◦RS0450

Self WorkshopDrilling Machine2Weeks from the assignment date

Small Coding Project

1. Press switch to show randomly number (0-9) on 7-Segment2. Press switch to show randomly position on LED row.3. Switch control Count-Up display (0-9) on 7-Segment and

Single dot LED walking for each step (TestFile.asm)4. Push switch 1 or 2 to select Count Up or Down display on

7-Segment and Single dot LED walking for each step 5. Push switch 1 or 2 to select Count Up or Down (0-255)

display as Binary on LED row6. Press switch for one walking step LED, when complete

each turn, increase 7-Segment’s number.7. Switch control Count-Up display (0-9) on 7-Segment. Show

number of counted turn in binary format on LED row.

SAMPLECount up 0-9 display on 7-Segment and Single dot LED walking for each step

Solution:If no pressing switch P3 = #11111111B or #0FFHOn Pressing switch P3.0, P3 = #0FEHOn Pressing switch P3.7, P3 = #07FHCondition for detect some switch was pressed is

P3 not equal to #FFHThen, CJNE A,#11111111B, Pressed ; will apply

Each pressing time, program run through main 3 steps are

Rotate P1

Increase P2

Delay 300 ms

Some switch was

pressed

True

Start

P1 = 00000001BP2 = 00H

Some switch was

pressed

Rotate P1

Increase P2

Delay 300 ms

ORG 00HMOV P1,#00000001B ; 8 LEDs MOV P2,#00H; 7-SegmentsWaitSW:

MOV A, P3CJNE A,#11111111B,PressedJMP WaitSW

Pressed:ACALL RotateP1ACALL IncreaseP2ACALL DelayJMP WaitSW

RotateP1:MOV A, P1RR AMOV P1, ARET

IncreaseP2:MOV A,P2INC ACJNE A,#0AH,NoAdjustMOV A, #00H ;Adjust to 0NoAdjust:MOV P2,ARET

Delay: MOV R1,#30DDelayLoop:

SETB TR0NotOver:JNB TF0,NotOver

CLR TR0CLR TF0DJNZ R1,DelayLoopRET

END

WaitSW:

Pressed:

JMP WaitSW

True

Part, Tools and Material Appendix

Warning

You can borrow drilling machine from technician room.

Work in your self workshop area.

Drilling Machine

Image from: qtena.comImage from: ebay.com You can borrow drilling

machine from technician room.

Single side Copper Clad PCBImage from: https://i3micro.org/2013/04/30/steps-of-diy-pcb-making/

Crystal (11.0592 MHz)

Straight Single Row 8-Pins Header, 2.54mm