The 8051 Microcontroller kit is a professional design single board computer. The intention for this design is to make a cheap microcontroller trainer for school students. With the hex monitor program, student will learn how to program the 8051 microcontroller using hex code. 

Machine code programming is the basic for learning real microcontroller hardware and instruction operation.

Here is the example:

Address    hex code      instruction            comment

9000         04                INC A                   increment accumulator register
9001         01 00           AJMP 9000          jump back to 9000

We can test this small code by entering hex code 04, 01 and 00 to memory at location 9000, 9001 and 9002.

Then test it with key STEP running, we will see the binary counting up at the 8-bit debugging LED. This will teach student binary number counting. They will see the real operation and how computer counts the binary number. 

Hardware features:
Processor: AT89S52, Microcontroller, 11.0592MHz with 8kB monitor program.
Memory: 256 bytes onchip memory, 32kB external code and data memory, 62256 
I/O port: Onchip P1 and P3.
Timer/counter: 16-bit timer 0,1,2.
Watchdog: Onchip Watchdog reset
RESET: Brownout reset chip, KIA4072.
Decoder: PLD memory and I/O decoder chip, GAL16V8
Display:  6-digit high brightness 7-segment LED, LTC4727
8-bit debugging LED, Carry flag display and P1.7 LED.
Keypad: 16-hex keys, 9 function keys and 3 CPU control keys.
Serial port: RS232C 9600 8n1, male connector.
LCD:  16-pin CPU bus interface for text LCD. 
Expansion: 40-pin header.

Electrical Power consumption 80mA @+5VDC.
Mechanical Dimensions: 5.7 x 5.3 inches
  
Kit is assembled and tested, no AC adapter, no LCD. 

Kit will need AC adapter with DC output approx. +9V 200mA. Any text LCD with HD44780 compatible can use.
More information please visit Build your own 8051 kit 
Free shipping with Thailand Post Registered AIRMAIL, plus tracking number. 

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