enk805x kit reference design

8/3/2019 ENK805X KIT Reference Design

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ENK805X Development Board Reference Design

User Manual

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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



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

http://www.ienk.com/documents.php?type=3

http://www.ienk.com/documents.php?type=3



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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: [email protected] or [email protected]

Regards,

Brian.song

mailto:[email protected]




enk805x kit reference design

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