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FARESPCB
ATMEL Development Kits
MODEL: FEPST3
GENERAL DESCRIPTION
FEPST3 is a simple kit designed particularly for students , beginners and recent
graduated engineers to allow them to esily work with many ATMEL microcontroller
chips, in addition to test and debug firmwares.
FEPST3 supports many ATMEL microcontroller chips, such as ATMEL89S51,
ATMEL89S52, ATMEL89S8252 and more. It offers all microcontroller I/O pins to
external connectors for direct port accessing , while provides the most common
primary devices and circuits , such as 2 X 16 LCD, Multiplexed 7SEG, Matrix KEYPAD,
and RS232 serial interface. Thus, it saves most of the wasted time and efforts in
hardware design and test, hence , the user can concentrate his efforts in software
development. the most important development in this kit is the ICSP circuit included.
This circuit make the programming of chip is so easy. Because you don't need to plug
the chip out during programming. only press one switch to change between program
and run mode.
Figure 1. FEPST3 kit real PCB view
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ATMEL Development Kits
MODEL: FEPST3
Figure 2. FEPST3 kit layout view
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ATMEL Development Kits
MODEL: FEPST3
Figure 3. FEPST3 kit schematic view
3
1
1
3
DI P S W-4
P2. 0
P2. 1
P2. 2
P2. 3
KEYPAD ENABLE
RX
D IP SW-2
TX
SERI AL ENABLE
18
19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
X2
X1
3
2
1
OU T
GN D
VIN
COM
COM
12-18 VDC
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12-18 VDC
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FARESPCB
ATMEL Development Kits
MODEL: FEPST3
FEPST3 KEY FEATURES
1)
2)
3)
4)
5)
6)
7)
POWER SUPPLY UNIT.
MICROCONTROLLER UNIT.
4X4 MATRIX KEYPAD UNIT.
FOUR LEDs DISPLAY UNIT.
TWO MULTIPLEXED 7SEG DISPLAY UNIT.
2X16 LCD DISPLAY UNIT.
ICSP AND SERIAL UNIT.
POWER SUPPLY UNIT
The power may be supplied from
1- Any DC walwart power supply adaptor via DC power socket (12V - 18V).
2- Any other source of power (12V – 18V) via screw clamp terminals.
3- Any PC via USB connecting cable.
The jumper labeled J1 is set to select the power supply source. It has two ways, one for USB
Of any PC labeled (USB) , and the other for adaptor source or via screw clamp terminals
labeled (ADP).
The power supply unit contains
Power supply on-off switch.
LED for power indication.
7805 (5V regulator IC with 5% tollerance).
.5A Fuse for over current protection.
Note 1: FEPST3 kit is protected against reversed polarity of power.
2:The input voltage and the 5V regulated output voltage are redirected to external
connector labled (output volt) for external using.
Figure 4. Power supply unit real PCB view
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ATMEL Development Kits
MODEL: FEPST3
Figure 5. Power supply unit layout view
Figure 6. Power supply unit schematic view
1
2
3
4
7805
ON-OFF POWER SW
USB CONNECTOR
SCREW CLAMP TERMINALS
1N4004
1
2
J1
VCC
3
2
1
Header
.5A FUSE
330R
220uF
GREEN LED
5V
1
2
DC SOCKET
VSP
VCC
GND
1
2
3
OUTPUT VOLT
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ATMEL Development Kits
MODEL: FEPST3
MICROCONTROLLER UNIT
40 pin DIP socket for microcontroller chip. Table 1 shows the supported microcontroller
chips.
11.0592 MHz crystal oscillator.
Power on reset circuit include reset switch.
Figure 7. Microcontroller unit real PCB view
Figure 8. Microcontroller unit layout view
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ATMEL Development Kits
MODEL: FEPST3
Figure 9. Microcontroller unit schematic view
40 PIN ZIF SOCKET
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
1
2
3
4
5
6
7
8
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
10
11
12
13
14
15
16
17
VCC
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
P0.0/AD0
P0.1/AD1
P0.2/AD2
P0.3/AD3
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
P3.0/RXD
P3.1/TXD
P3.2/INT0
P3.3/INT1
P3.4/T0
P3.5/T1
P3.6/WR
P3.7/RD
P2.7/A15
P2.6/A14
P2.5/A13
P2.4/A12
P2.3/A11
P2.2/A10
P2.1/A9
P2.0/A8
39
38
37
36
35
34
33
32
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
28
27
26
25
24
23
22
21
P2.7
P2.6
P2.5
P2.4
P2.3
P2.2
P2.1
P2.0
VCC
RESET
9
RST
EA/VPP
ALE/PROG
PSEN
31
30
29
11.0592
27pF
27pF
Table 1. List of chips supported by FEPST3
Chip number
AT89S51
AT89S52
AT89S53
AT89S8252
AT89S8253
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ATMEL Development Kits
MODEL: FEPST3
4X4 MATRIX KEYPAD UNIT
FEPST3 KIT includes 16 input switches attached to port D configured as 4 rows intersected by
four columns. each intersection creates switch position.
The four row lines are connected to high nipple of port D as shown.
Port P2.7 ------ ROW1
Port P2.6------ ROW2
Port P2.5------ ROW3
Port P2.4------ ROW4
The four column lines are connected to low nipple of port D as shown.
Port P2.3------ COL1
Port P2.2------ COL2
Port P2.1------ COL3
Port P2.0------ COL4
COLUMN
COL1
COL2
COL3
COL4
P2.3
P2.2
P2.1
P2.0
ROW1
P2.7
SW1
SW2
SW3
SW4
ROW2
P2.6
SW5
SW6
SW7
SW8
ROW3
P2.5
SW9
SW10
SW11
SW12
ROW4
P2.4
SW13
SW14
SW15
SW16
Each column can be enabled/disabled individually via "KEYPAD ENABLE" DIP switch. If
you don't intend to use the keypad absolutely, you must disable all columns.
You may use the first row i.e. (SW1,SW2,SW3,SW4) as a direct input switches (not in
matrix mode) by setting jumper J2 to (1-2). Otherwise set it to (2-3).
Note: Port D is pulled up by a 10K resistor. i.e. (microcontroller read high if no switch is
pressed).
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ATMEL Development Kits
MODEL: FEPST3
Table 2. This table indicates the setting of jumper J2 and DIP switch to configure
keypad.
DIP switch setting
J2(1-2)
Direct
P2.3
SW1 enabled (P2.3)
P2.2
SW2 enabled (P2.2)
P2.1
SW3 enabled (P2.1)
P2.0
SW4 enabled (P2.0)
J2(2-3)
Matrix
P2.7,P2.3 ---->
P2.6,P2.3 ---->
P2.5,P2.3 ---->
P2.4,P2.3 ---->
P2.7,P2.2 ---->
P2.6,P2.2 ---->
P2.5,P2.2 ---->
P2.4,P2.2 ---->
P2.7,P2.1 ---->
P2.6,P2.1 ---->
P2.5,P2.1 ---->
P2.4,P2.1 ---->
P2.7,P2.0 ---->
P2.6,P2.0 ---->
P2.5,P2.0 ---->
P2.4,P2.0 ---->
SW1
SW5
SW9
SW13
SW2
SW6
SW10
SW14
SW3
SW7
SW11
SW15
SW4
SW8
SW12
SW16
Figure 10. 4X4 matrix keypad unit real PCB view
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ATMEL Development Kits
MODEL: FEPST3
Figure 11. 4X4 matrix keypad unit layout view
Figure 12. 4X4 matrix keypad unit schematic view
J2
3
2
1
P2.7
COL1
COL2
COL3
COL4
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
SW9
SW10
SW11
SW12
SW13
SW14
SW15
SW16
ROW1
Header
ROW2
P2.6
ROW3
P2.5
ROW4
P2.4
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ATMEL Development Kits
MODEL: FEPST3
FOUR LEDs DISPLAY UNITS
Four r ed LEDs wit h 330 curr ent lim it ing r esist or s ar e connect ed t o por t pins P3.7, P3.6, P3.5
and P3.4. Each LED can be individually enabled or disabled via LEDEN DI P sw it ch. LEDs ar e
act ive low. i.e. out put low t urn LED on and out put high t urn it off.
Figure 13. Four LEDs display unit real PCB view.
Figure 14. Four LEDs display unit layout view.
Figure 15. Four LEDs display unit schematic view.
DIP SW-4
P3.7
P3.6
P3.5
P3.4
330R
L1
330R
L2
VCC
LEDEN
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330R
L3
330R
L4
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ATMEL Development Kits
MODEL: FEPST3
TWO MULTIPLEXED 7SEG DISPLAY UNITS
Tw o m ult iplex ed 7seg digit wit h BCD decoder ( 7447) . The decoder input s ar e connect ed t o
m icr ocont r oller pins P1.0, P1.1, P1.2, and P1.3. Each 7seg digit can be enabled or disabled
indiv idually using 7- SEG ENA DI P sw it ch. Not e t hat enable signal is act ive low i.e. a low
out put enables t he r equir ed 7SEG.
Table 2. The following table shows the required decoder input to display the numbers from
0 to 9.
Digit
Decoder inputs
P1.3 P1.2 P1.1 P1.0
0
1
2
3
4
5
6
7
8
9
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
Figure 16. Two multiplexed 7SEG unit real PCB view.
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ATMEL Development Kits
MODEL: FEPST3
Figure 17. Two multiplexed 7SEG unit layout view.
Figure 18. Two multiplexed 7SEG unit schematic view.
7447
P1.0
P1.1
P1.2
P1.3
7
1
2
6
3
5
220R
D0
D1
D2
D3
A
B
C
D
E
F
G
LT
RBI
BI/RBO
13
12
11
10
9
15
14
S2
A
B
C
D
E
F
G
A
B
C
D
E
F
G
7 -SEG
S1
A
B
C
D
E
F
G
A
B
C
D
E
F
G
7 -SEG
A
B
C
D
E
F
G
4
10K
P3.3
P3.2
10K
8550
8550
7SEG EN
VCC
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VCC
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ATMEL Development Kits
MODEL: FEPST3
2X16 LCD DISPLAY UNIT
2X16 alphabet ic LCD w it h
t o por t P0 as follows,
PORTP0.7 is connect ed t o
PORTP0.6 is connect ed t o
PORTP0.5 is connect ed t o
PORTP0.4 is connect ed t o
PORTP0.3 is connect ed t o
PORTP0.2 is connect ed t o
PORTP0.1 is connect ed t o
PORTP0.0 is connect ed t o
backlight and cont r ast cont rol configured in 4bit m ode is connect ed
D7 of LCD
D6 of LCD
D5 of LCD
D4 of LCD
backlight cont rol. out put low on t his pin t urn backlight on.
EN of LCD
R/ W of LCD
RS of LCD
A 10K var iable r esist or labeled " CONT" is added t o cont r ol t he LCD cont r ast .
Set "LCDEN" DI P sw it ch t o enable or disable LCD m odule.
Figure 19. 2X16 LCD display unit real PCB view.
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ATMEL Development Kits
MODEL: FEPST3
Figure 20. 2X16 LCD display unit layout view.
Figure 21. 2X16 LCD display unit schematic view.
VCC
R3
10K
CONTRAST
VCC
DIP SW-8
P0.0
P0.1
P0.2
P0.4
P0.5
P0.6
P0.7
P0.3
RS
RW
EN
D4
D5
D6
D7
BACKLIGHT
R2 10K
8550
LCDEN
VCC
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ATMEL Development Kits
MODEL: FEPST3
ICSP AND SERIAL UNIT
Ser ial unit include RS232- TTL logic conver t er using t wo sm all signal t r ansist ors. And pr ovides
DB9F socket for PC serial com m unicat ion. Ser ial int erface circuit can be enabled or disabled
using DI P sw it ch labeled Rx , Tx . I f t his unit is enabled, you can't use t he t wo por t pins P3.0,
P3.1 from ext ernal connect or s. Cr oss or st raight cable can be used by swit ch set t ing .
To swit ch bet ween r un m ode and pr ogr am m ing m ode use PROG swit ch. Press t he swit ch t o
ent er in pr ogr am m ing m ode ( PROG) and r elease it t o sw it ch t o r un m ode ( RUN) .t he green
LED labeled PROG is an indicat or for pr ogr am m ing m ode.
Figure 22. ICSP and serial unit real PCB view
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MODEL: FEPST3
Figure 23. ICSP and serial unit layout view
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ATMEL Development Kits
MODEL: FEPST3
Figure 24. RS232 serial interface unit schematic view
VCC
10K
PROG SWITCH
16
17
18
TX_PROG
RX_PROG
10K
TX
2
8550
VCC
CROSS/STRAIGHT CABLE
13
14
RX
15
10K
MOSI
10
10K
11
12
2
MISO
7
8050
8
9
SCLK
10K
1
6
2
7
3
8
4
9
5
4
DB9 FEMALE
5
6
VCC
RESET
1
2
3
330R
P1.5
TO ATMEL MICROCONTROLLER CHIP
P1.6
PROG LED
GREEN
P1.7
TO EXTERNAL CONNECTORS
P3.0
P3.1
RESET
Figure 25. Straight/Cross cable connection
1
6
2
7
3
8
4
9
5
1
6
2
7
3
8
4
9
5
DB9 MALE
1
6
2
7
3
8
4
9
5
DB9 FEMALE
1
6
2
7
3
8
4
9
5
DB9 MALE
Straight serial cable
DB9 FEMALE
Cross serial cable
(b)
(a)
PORT CONNECTORS
Alt hough FEPST3 Kit has a very popular built in cir cuit s and dev ices ( swit ches , LEDs , 7seg ,
LCD and ot her ) , but any cir cuit can be enabled or disabled via DI P swit ch set t ing. And so t he
associat ed port pins are allowed t o any ot her applicat ions t hr ough scr ew clam p t erm inals .
Note Please insure t o disconnect t he built in circuit s which is connect ed t o t he por t pins you
decide t o use.
The ext er nal connect or s ar e grouped int o 4 unit s each repr esent one m icr ocont roller por t ( 8
I / O) .
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ATMEL Development Kits
MODEL: FEPST3
Figure 26. Microcontroller port pins real PCB view
Figure 27. Microcontroller port pins layout view
Figure 28. Microcontroller port pins schematic view
Screw clamp terminals
Screw clamp terminals
Screw clamp terminals
Screw clamp terminals
PORT0
PORT1
PORT3
PORT2
FEPST3 includes standard 2.5" X 6.75" breadboard for easy circuit
making and extensions.
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ATMEL Development Kits
MODEL: FEPST3
HOW TO START?
We recommend few tests before begin to use FEPST3 KIT.
1- Det erm ine t he supply sour ce and set j um per 1 as illust r at ed pr eviously in t he POWER
SUPPLY UNI T sect ion.
2- Deselect all unused built in cir cuit s in t he kit . This is accom plished by set t ing DI P swit ches
LCDEN for LCD enable/ disable.
KEYPAD ENABLE for KEYPAD enable/ disable.
LEDEN for LEDs enable/ disable.
DI P SW- 2 for select ed digit s.
SERI ALEN for ser ial enable/ disable.
2- Befor e plugging t he chip in ZI F sock et , insur e t he power delivery by connect ing t he supply
and swit ching t he power. I f t he power LED is init iat ed t hen t her e is a power connect ed t o t he
KI T. Using a volt m et er, m easur e t he volt age differ ence bet ween GND and VCC at t he OUT
connect or . I t should be 5V±0.5V.
3- Now t ur n off t he power sw it ch and inser t your pr ogr am m ed m icr ocont roller chip in t he ZI F
sock et , and enj oy your t im e w it h FEPST3 KI T.
I f you w ant t o t est t he built in cir cuit funct ionalit y, use a m icrocont roller program m ed wit h
t he t est code FEPST3t est .hex w hich included in t he CD.
The t est operat ion is:
Enable all DI P sw it ches in k it ( LEDEN,7SEGEN,LCDEN,KEYPADENABLE,SERI ALENABLE) .
Set J1 according t o t he supply sour ce.
Set J2 To ( 2- 3) posit ion.
Set RUN/ PROG sw it ch t o PROG m ode ( PROG LED w ill be t ur ned on) .
Connect serial cable ( m ale t o fem ale) and set dir ect ion sw it ch according t o t he ser ial
cable t ype ( release t he swit ch if st raight cable is used or pr ess it if cr oss one) .
Tur n power sw it ch on.
Open t he burner pr ogr am m icropr o.exe .
Set t he com port from ( opt ions - set t ings)
Chose t he AT89S51 chip from ( opt ions – device)
Load t he t est code included in CD ( FEPST3.hex) from ( file - load flash file) .
Select CHI P ERASE t hen click RUN but t on.
Right click t he pr ogram but t on.
Aft er pr ogr am m ing is com plet ed set RUN/ PROG sw it ch t o RUN m ode.
And follow t he next st eps t o t est all circuit s in FEPST3 kit .
LCD test
**** FEPST3 ****
FARES EDU PROD
When you pow er on FEPST3 kit LCD displays
seconds t hen t ur noff.
and flickers for 4
7SEG test
Each 7seg digit s count s fr om 0 t o 9 cont inuously.
LED test
LEDs ar e t urned on in a per iodic sequence cont inuously.
KEYPAD test
The pressed sw it ch is det ect ed and it s num ber is displayed on LCD in t he first line as
SW(12) IS PREESSED
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ATMEL Development Kits
MODEL: FEPST3
SERIAL test
RECEIVING test
Any t ext r eceived from t he serial m odule will be displayed at t he second line of LCD.
TRANSMITTING test
I f SW16 is pressed Serial m odule Tr ansm it s " FARES EDUCATI ONAL PRODUCTS FEPST3 KI T"
Com pact Disc ( CD) cont ains,
User’s Manual.
Dat asheet of support ed m icrocont roller chips.
Test code FEPST3t est .hex
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