Wichit Sirichote 8051 User manual

User’s Manual
8051 Project Board v1.0
Wichit Sirichote, wichit.sirichote@ mail.com
Rev. 1.0, October, 2017

Contents
1. Overview
2. Gettin started
3. Usin Mikro-c for 8051
4. Example of c pro rams
Schematic
Bill of Materials (BOM)

1. Overview
The 8051 project board is desi ned for teachin how to develop a dedicated microcontroller project
usin c codin . The project board is based on the SuperFlash SST89E51RD microcontroller. The
MCU has 64kB code memory with extra 1024 bytes RAM. This memory size is very suitable for c
codin . In addition, the board also provides the 7-se ment display, LCD display, keypad, the analo
to di ital converter and USB port.
The MCU has bootloader firmware. We can pro ram the code memory without the need of external
pro rammer. Only the micro USB cable will be needed.
While developin the code with PC, the 8051 project board ets the power from USB port directly.
The micro USB port allows many power sources, e. ., power bank, cheap cell-phone AC adapter.
The example c pro rams demonstrate how to write c code to control the display, UART, keypad.
8051
2 channel ADC SST89E516RD 4-digit 7-segment
display
4 Tact s itches
UART
USB
64kB

Basic layout
Basic components are:
1. SST89E51RD, 40-pin Microcontroller.
2. 4-di it 7-se ment display.
3. USB-UART interface chip, CH340G
4. Tact switch keypad.
5. Micro-USB cable

2. Getting started
Students will need PC, or Notebook computer with USB port. The PC will run c compiler pro ram
and EasyIAP for hex code downloadin .
The UART-USB device, CH340G will need the hardware driver.
Step 1 Download and install the driver.
http://www.kswichit.com/Flashflex/ima es/CH34x_Install_Windows_v3_4.zip
When connect the project board to the PC USB port, the hardware mana er will assi n the COM
port number automatically.
We can modify the COM port number easily by ri ht click, properties/port settin s/advance.
The example was set it to COM2.

We can test communication between the PC and project board by usin the EasyIAP pro ram.
Step 2 Download and install the EasyIAP.
http://www.kswichit.com/Flashflex/EasyIAP%20Rev%206.0.zip
Run the EasyIAP. Click Option.
Select COM2, and SST89E51RD chip.

Press ESET button on the project board.
Then CLICK OK, and release ESET button immediately!
The EasyIAP will connect the project board and display chip information.
The IAP Status shows Detect tar et MCU is successful!

Click Read ri ht-hand, the code memory will be read. We can see the buffer memory window. It
shows the memory contents in HEX number.

How to write the hex code to the MCU.
Now let us try pro ram the MCU with hex code.
Download the hex file http://www.kswichit.com/Flashflex/ima es/scan2.hex
We will try usin the EasyIAP to pro ram this hex code the MCU.
Step 4 econnect the project board with Connect click again.
Click Dnload/Run UserCode 1.
Then Click the hex file 2.

Then Click YES, the correspondin sectors will be erased.
After completed, the CPU will jump from bootloader to user code.
We will see the display showin 8051.