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ENK805X Development Board Reference Design
User Manual
iENK.com Proprietary
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Features Introduction
l MCU:ATMEL AT89S52 (also can support AT89C51/AT89C52/AT89S51)/ISP connector for in-circuit
programming.
l RS-232 serial port interfacing.
l 1602 LCD connection port.
l 1 * RS-232 communication for connection with a PC.
l Digital LED display with 6 bit and 7 sections.
l 8 LEDs are provided.
l RELAY with 3A/30VDC 3A/220VAC NO and NC contacts with screw terminals.
l 2-ch. DC motor driver with indicators. Support motor voltage 1.5 to 5Vdc.
l Beeper.
l 4 buttons are provided.
l Small (98mm x 47mm x 15mm).
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1 ENK805X KIT Board Schematic
1.1 Introduction
This document includes design information, schematics and parts list, for the ENK805X KIT reference board.
1.2 Revision History
The revision history for this document is provided in the following table.
Table 1-1 Revision history
Version data Description
1.00 October 13, 2008 Initial release
1.3 Schematic
The schematic is not optimized for production due to its conservative design approach.
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Package includes the following item:
1. ENK805X ATMEL 8051 Development Board * 1 ( included 1pcs AT89S52-24(PU) Chip)
2. 3pin Experimental wire * 1
3. 4pin Experimental wire * 1
4. Nuts and Screws set * 4
5. user manual please download for www.ienk.com
Notice:
Worldwide shipping by Registered Air Mail---- about 5-15days
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support AT89C51/AT89C52/AT89S51support AT89C51/AT89C52/AT89S51 ……
P OWE R S wi t c h
D C 9
V I N P U T
+
D C M o t or s i gn al i n p u t s wi t c h
F U N
K E Y 3
F U N
K E Y 2
F U N
K E Y 1
S Y S
R E S E T
L E D
* 8
L C D
1 6 0 2 P OR T
P OW
E R L E D
8 L e d
& L c d 1 6 0 2 s wi t c h
M o t or d r i v e c h i p
S t an d ar d I S P I n t er f a c e
RF RX module interfaceDigital LED 6 bit and 7 sections
S er i al O u t p u t I n t er f a c e
R S 2 3 2 c h i p
M o t o
r c h i p O U T
ENK805X Borad functional description√
L:98mm
W: 4 7 mm
B e e p er
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ATMEL AT89S52 Development Board KIT ENK805XENK805X Functional diagram
6 bit 7sections Digital LED connection port connection port
ATMEL AT89C51/C52/S51/S52/S53/...
M OT OR POWER
SWITCH
P0,P2
LCD1602
LED*8
RST KEY1 KEY2 KEY3BEEPER
ISP
R S 2 3 2
RELAYP1 P3
Board size: 98 x 47 x 15(mm) Model: ENK805X
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Power Connection
Power modules supplies power for the entire development board ENK805X, it provides
5VDC output for all functional modules to work. Power Interface shown in Figure.
The connection needs through the external input direct-current power supply, the input range in 6V~12V, to recommend 9V the
voltage. Note: The interface to the center of the positive.
LCD power supply and 8*LED power supply switching
In the figure above demonstration is 8*LED the power source condition
In the figure above demonstration is LCD the power source condition
Power witch
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Serial port connection explanation
As shows, black 3Pin part for serial port output connection position. The design idea is facilitates other modules
the connection. The serial port may connect computer's serial port position.
DC motor drive connecting the output
DC motor driver IC is the completion of a similar DIY robot movements and toy car motor drive motor drive. It can drive one
or two motors running.
Please note: I do not recommend you use it to drive high-power DC motor, due to driver IC connected to the L7805, power the
greater the power consumption may increase in L7805. Possibly will damage the power supply chip-L7805.
RXD
TXD
GND
GND M1 GND M2
M
M
M
GND M1 GND M2
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Relay control output
Relay outputs can be isolated for high-voltage electrical switch control. The relay outputs has two cluster switches, a group is
often open, a group is often closed. You may need to implement an external device according to the switch control.
Please note: Use the relay switch, try not to use high-voltage electrical equipment to do controlled experiments. In order to
avoid electric shock accident.
External Control Interface
the 6Pin jack, uses in the external signal the input. Such as the RF received signal. You can programmatically control the input
or output. At the same time you can refer to ENK schematic to understand and learn.
You can contact me via e-mail way, tell me all the problems you encounter, I will try to help you. Be happy to
help you.
!
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ISP programming
ENK805X development board offers a standard ISP programming interface AT89S52 Chip, you can be very easy to use with
the ISP to connect to the control of programmers.
You can through the website http://www.ienk.com/documents.php?type=3, download digital LED test code.
File Name: ledclock.hex. Test ENK805X digital LED, the following is my own computer presentations.
ISP Interface
ISP program
downloader
The device does not exist
ENK805X capacity to
buy goods in the list
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Last note: I am writing skills in English is not good, please excuse. The case in the use ENK805X process, have any questions
please send an e-mail to me.
Email: info@ienk.com or chunweb@gmail.com
Regards,
Brian.song