Microprocessor PCB Design by: Tuan Hung Huynh April 3, 2006

Microprocessor PCB DesignMicroprocessor PCB Designby:

Tuan Hung Huynh

April 3, 2006

OutlineOutline

BackgroundDesign ProcessApplicationResults

PurposePurpose

Designing computer circuits and software for the Microprocessor class.

PCB layout softwareDocumentation

BackgroundBackground

Past DesignsPast Designs

People to mention– Wi Sugiri (projects)– Dan Sossaman (board)– Neil Clukode – Matt Olson – Tuan Huynh– Chris Carpenter

MicrocontrollerMicrocontroller

Microcontroller or Microprocessor?– Microcontroller – basic– Microprocessor - complex

Atmel and Intel 8051 core architecture– AT89S8252 (8052)– AT89S8253 (8053)

Design ProcessDesign Process

StructureStructure

Developing the schematic layout Updating and improvements Ordering of components Developing software Transforming into a workable circuit Testing and demonstration Optional manufacture

of the PCB

ProtelProtelSchematic Layout

1

1

2

2

3

3

4

4

5

5

6

6

D D

C C

B B

A A

Title

Number RevisionSize

B

Date: 2/20/2006 Sheet of File: G:\Thesis-MicroprocessorBoard-090605\..uProBoard2.SchDocDrawn By:

P1.1 (T2EX)2

P1.23

P1.34

P1.4 (SS)5

P1.5 (MOSI)6

P1.6 (MISO)7

P1.7 (SCK)8

P1.01

P3.0 (RXD)10

P3.1 (TXD)11

P3.2 (INT0)12

P3.3 (INT1)13

P3.414

P3.515

P3.6 (WR)16

P3.7 (RD)17

XTAL118

XTAL219

GND20

RST9

P2.021

P2.223

P2.324

P2.425

P2.526

P2.627

P2.728

PSEN29

ALE30

EA31

P0.7(AD7)32

P0.6(AD6)33

P0.5(AD5)34

P0.4(AD4)35

P0.3(AD3)36

P0.2(AD2)37

P0.1(AD1)38

P0.0(AD0)39

VCC40

P2.122

AT89S8252

U1

1 2 3 4 5 6 7 8 9 10

11

12

13

14

15

16

LCD HeaderJP18

12

PLD BypassJP6

1234567891011

Disp

lay O

utp

ut

JP17

1 2 3

Handshake In/Out

JP7

1234

MMIO ControlJP9

1 2Analog InJP2

12

7Seg Control Select

JP3

12

Power InJP4

12

Power OutJP5

12345678

Po

rt 0

JP10

12345678

Address Latch Output

JP15

12345678

Po

rt 1

JP11

1 2 3 4 5 6 7 8

Buffered I/O

JP16

12345678

Po

rt 2

JP12

12345678

Po

rt 3

JP13

1 2 3 4 5 6 7 8

Keypad Header

JP14

123

Power JackJP8

Vin1

GN

D2

Vout3

5V

U12

1N4007

D1

.1uF

C4

.1uF

C5

.1uF

C6

GND

VCCLM7805CT

GND

EA

VCC

U1-31

AD07 U1-32AD06 U1-33AD05 U1-34AD04 U1-35AD03 U1-36AD02 U1-37AD01 U1-38AD00 U1-39

P1.7 U1-8P1.6 U1-7P1.5 U1-6P1.4 U1-5P1.3 U1-4P1.2 U1-3P1.1 U1-2P1.0 U1-1

A15 U1-28A14 U1-27A13 U1-26A12 U1-25A11 U1-24A10 U1-23A09 U1-22A08 U1-21

P3.7 U1-17P3.6 U1-16P3.5 U1-15P3.4 U1-14P3.3 U1-13P3.2 U1-12P3.1 U1-11P3.0 U1-10

PSEN

ALE

MMIO RD

MMIO WR

U1-29

U1-30

U3-14

U3-15

VCC7

TX12

TX21

RX13

RX220

GND6

GND9

C1-13

C1+8

V-17

V-12

C2-16

C2-10

C2+15

C2+11

TX1-RS2325

TX2-RS23218

RX2-RS23219

RX1-RS2324

V+14

RS233

U8VCC

11

22

33

44

55

66

77

88

Serial Comm

P2

11

22

33

44

55

66

77

88

Programming

P1

ISP

SE

RIA

L

GND

GND

R1

RE2

DE3

D4

VCC8

B7

A6

GND5

RS485

U10VCC

GND

1Q19

Vcc20

2Q18

3Q17

4Q16

5Q15

6Q14

7Q13

8Q12

LE11

GND10

8D9

7D8

6D7

5D6

4D5

3D4

2D3

1D2

OE1

SN74HC573N

U6

1Q19

Vcc20

2Q18

3Q17

4Q16

5Q15

6Q14

7Q13

8Q12

LE11

GND10

8D9

7D8

6D7

5D6

4D5

3D4

2D3

1D2

OE1

SN74HC573N

U7

GND

AD00AD01AD02AD03AD04AD05AD06AD07U1-32

U1-33U1-34U1-35U1-36U1-37U1-38U1-39

KeyLE(To U3-19)

123456789

10K

RP1

GND

VCC

VCCVCC

RP1-1RP1-2RP1-3RP1-4RP1-5RP1-6RP1-7RP1-8

RP1-1RP1-2RP1-3RP1-4RP1-5RP1-6RP1-7RP1-8

KeyOE (To U3-18)

AD00AD01AD02AD03

U1-39U1-38U1-37U1-36

VCC

REF +1

An_In2

REF -3

GND4

CS5

DOUT6

SCLK7

VCC8

TLC549CP

U11

GND

2.2uFC8

GND

.1uFC7

GND

1Q19

Vcc20

2Q18

3Q17

4Q16

5Q15

6Q14

7Q13

8Q12

LE11

GND10

8D9

7D8

6D7

5D6

4D5

3D4

2D3

1D2

OE1

MM74HC573

U4

1Q19

Vcc20

2Q18

3Q17

4Q16

5Q15

6Q14

7Q13

8Q12

LE11

GND10

8D9

7D8

6D7

5D6

4D5

3D4

2D3

1D2

OE1

MM74HC573

U5

GND

GND

VCC

12345678910KRP2

VCC

AD00AD01

AD02AD03

AD04AD05AD06AD07

GND

A141

A122

A73

A64

A55

A46

A37

A28

A19

A010

D011

D112

D213

GND14

D315

D416

D517

D618

D719

CS20

A1021

OE22

A1123

A924

A825

A1326

WE27

VCC28

GENMEM

U2

IN1

IN2

IN3

IN4

IN5

IN6

IN7

IN8

IN9

IN10

IN11

GND12

IN13

I/O14

I/O15

I/O16

I/O17

I/O18

I/O19

I/O20

I/O21

I/O22

I/O23

VCC24

ATF22V10CQZ

U3

1 42 3

SW-PB-4pin

S1

1N4148D2

VCC

GND

7seg A/LCD RSP1.0

GNDVCC

FROM Q4-C7seg A/LCD RS

7seg B/LCD WRP1.17seg C/LCD ENP1.2

7seg B/LCD WR7seg C/LCD EN

Seg ASeg BSeg CSeg DSeg ESeg FSeg GSeg H

P1.3SSP1.4MOSIP1.5MISOP1.6SCKP1.7

RSTP3.0P3.1P3.2

IRP3.3P3.4P3.5P3.6

RDP3.7

GND

Not Used

WR To U3-10To U3-11

SCKMISO

VCC

SS

GND

MOSIMISO

SCKRST

TO U1-6

1 2

XTAL

11.0592MHzY1

33pF

C1

33pF

C2

GND

C3

B2

E1

2N3906

Q4

C3

B2

E1

2N3906

Q5

3.3K

R5

24K

R10

300K

R13

12K

R9150K

R12

t°

50K

RT1

1N5235D3

JP1-2 EA

U3-9 PSENU3-5 A15U3-5 A14U2-26 A13U2-2 A12U2-23 A11U2-21 A10U2-24 A09U2-25 A08

GND

VCC

A13A12A11A10A09A08 U1-21

U1-22U1-23U1-24U1-25U1-26

ALEU4-11

ALE

1 42 3

SW-PB-4pin

S2

A1

K2

LED2

DS2

330

R1

GND

VCC

VCC 7seg A/LCD RS

A00A01A02A03A04A05A06A07

VCC

A00A01A02A03A04A05A06A07

A00A01A02A03A04A05A06A07

A00A01A02A14 U1-27A15AD00

PSENWRRD

U1-28U1-39U9-12U1-29U1-16U1-17

GND

AD00 U1-39AD01 U1-38AD02 U1-37AD03 U1-36AD04 U1-35AD05 U1-34AD06 U1-33AD07 U1-32

GND

VCC

GND

12345678

161514131211109

330RP3

Seg ASeg BSeg CSeg DSeg ESeg FSeg GSeg H

VCC

ISP OE Not UsedKeyLE U6-11KeyOE (To U7-1)

N/CDSP LEMMIO WR JP9-4MMIO RD JP9-3

DSP LE

PROGRAMMABLE LOGIC

1KR3

VCC

A1

B13

C10

D8

E7

F2

G11

DP9

CC14

CC3

a

bf

c

g

de

dp

7-SEG

DS1

32

1

PNA4613M00YB

DIODE IR DETD4

VCC

GND

GND

G1

D2

S3

RFP30N06LE

Q2

G1

D2

S3

RFP30N06LE

Q3

GND

GND

G1

D2

S3

RFP30N06LE

Q1

GND

FROM U1-2

FROM U1-3

FROM U1-1

GND

H1 H2 H3 H4

10K

R6

GND

10KR7

10K R8

GND

GND

10uF10V

C9

10uF10V

C10

7seg C/LCD EN

7seg B/LCD WR

123

External Addressing EnableJP1

GND

LCD CT (currently not used)

LCD CT N/AGND

DIR1

A45

B118

B316

B217

A56

A67

A78

A89

OE19

VCC20

B811

B712

B613

B514

A23

A34

A12

B415

GND10

SN74HC245N TRISTATE BUFFER

U9

GNDGND

10KR4

VCC

RST IN N/A

ProtelProtelSchematic and PCB LibrariesCustom componentsLink of files

Schematic library

PCB library

ProtelProtel

PCB Layout– Physical representation

ProtelProtel

Design Rule Check (DRC)– Short Circuits– Broken Nets– Height and Width Constraints– Hole Size– Clearance Constraints

ProtelProtel

Assembly Files– Gerber Files– NC Drill Files

.GTL Top Layer

.GBL Bottom Layer

.GTO Top Overlay

.GBO Bottom Overlay

.GTS Top Soldermask

.GBS Bottom Soldermask

.GKO Keep-out Layer

.apr

Drill Files.drr

.drl

Assembly FilesAssembly Files

Top Silkscreen


Top and Bottom Copper


Top Soldermask and Bottom Soldermask


Drill File

Creation of the PCBCreation of the PCB

Board Manufacture– Advanced Circuits

www.4PCB.com www.FreeDFM.com

Component Vendors– Digikey – All Electronics

ApplicationApplication

Microprocessor ProjectsMicroprocessor Projects

Microprocessor Design class:

Digital Metronome T-Bird Taillights Digital Clock Serial Communication Memory Mapped Input/Output 7-Segment Displays Keypad Input LCD Display


Digital MetronomeT-Bird TaillightsDigital Clock

– Port 3 SEC MIN


Serial Communications– Hyper-terminal– RS232 buffer chip– Serial cable


Serial Communications Cable– DB9 to RJ45


Memory Mapped Input/Output– Data latch


7-Segement Displays– Data latch– Programmable logic device– FETs


Keypad– Data latch– PLD


Liquid Crystal Display– Data latch– PLD

Problems EncounteredProblems Encountered

Issues with new microcontrollers– Chip burners– Capacitance– Internal Fuse Bits

In-System-Programming Circuit

In-System-ProgrammingIn-System-Programming

Modification of the board is possible– Buffer chip– Programmable logic device– Re-wire

Programmable Logic Device

Pin 8Pin 20

RJ45 Jack

Pin 8

Pin 19

In-System-ProgrammingIn-System-Programming

ISP Cable– DB25 to RJ45

ResultsResults

CompletionCompletion

Board applied in the classroomUpdate from previous designsCapable of future updates

Future DesignFuture Design

Reduction of ComponentsDual MicrocontrollersUSBSurface Mount Components

QuestionsQuestions

ReferencesReferences

Marcus O. Durham, PhD. Systems Design and the 8051. Second Edition. TechnoPress. Tulsa, OK. 2003 – 2004.

Altium – Protel http://www.4pcb.com http://www.allelectronics.com http://www.play-hookey.com/digital/experiments

/seven_seg_led.html

Documents

Microprocessor PCB Design by: Tuan Hung Huynh April 3, 2006