Programming STC MCU

Design and development

Dr. C.K Chan

MECH 3012

Workshop 11

STC MCU: ISP Programming

Department of Mechanical Engineering

The University of Hong Kong

Workshop 11 STC MCU: ISP programming

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Table of content

1. Introduction ...................................................................................... 2

2. General procedures for ISP programming ...................................... 4

2.1. Prepare *.hex file .................................................................... 5

2.2. Connect cable to the Development board .............................. 8

2.3. Execute ISP program .............................................................. 9


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1. Introduction

STC12C5A60S2 is a single-chip microcontroller based on a high

performance 1T architecture 80C51 CPU, which is produced by STC MCU

Limited.

With the enhanced kernel, STC12C5A60S2 executes instructions in 1~6

clock cycles (about 6~7 times the rate of a standard 8051 device), and has a

fully compatible instruction set with industrial-standard 80C51 series

microcontroller.

In-System-Programming (ISP) and In-Application Programming (IAP)

support the users to upgrade the program and data in system.

• It allows the user to download new code without removing the microcontroller from the actual end product; ISP

• It means that the device can write non-valatile data in Flash memory while the application program is running. IAP


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The STC12C5A60S2 retains all features of the standard 80C51. In addition,

the STC12C5A60S2 has:

1) Two extra I/O ports (P4 and

P5: package depend),

2) A 10-sources (4 priority-level

interrupt structure),

3) 10-bit ADC,

4) Two UARTS,

5) On-clip crystal oscillator,

(for ISP programming)

6) A 2-channel PCA and

PWM,

7) SPI,

8) A one-time enabled

Watchdog Timer.

STC12C5A60S2 series Selection Table is given below:

The STC company also provide MCUs of low cost as AT89S52, such as STC89C51RC.


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2. General procedures for ISP programming

Some development boards require STC series MCU to be

cool boot during ISP programming process.

1) Prepare *.hex file

2) Connect cable

3) Execute ISP program

4) Select COM port

5) Select MCU type

6) Open *.hex file

7) Turn off power to MCU

8) Press download

button

9) Turn on power to MCU


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2.1. Prepare *.hex file

Replace the file c:/Keil/UV4/uv4.cdb with the file provided in my web site

(www.hku.hk/mech/compapp) to add the MCU selection list.

Select the right project option:

http://www.hku.hk/mech/compapp


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STC12C5A60S2

No


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Download the header file for STC12C5A60S2 to your project folder from

my Web site.

Include this header file to your program. You should use this header file

only instead of others which provide definition of variables for the STC

MCU. It also contains definition of tradition 8051 MCU.

#include “stc_new_8051.h”

…..

main( )

{…}

Write and build your program with Keil vision.


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2.2. Connect cable to the Development board

Depends on the design of the development board, you may need to use

different types of cable.

You need to install the corresponding driver for the development board.

• Power supply and program download

Single USB

• USB: Power supply

• USBRS232: Program download

USB + USBRS232

Single USB


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2.3. Execute ISP program

Download the ISP program from my web site. Both program can be

executed without installation.

STC4.88

• Support winXP, win7-32bit

• English interface

PzISP

• Support winXP, win7 32/64 bit

• Simplified chinese interface

USBRS232

USB power supply

USBRS232

USB


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For STC-ISP 4.88

1) Select MCU

2) Open code file (*.hex)

3) Select COM port and baud rate

1

4 3

5

6

7

2


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How to check the COM port?

Under Window7 control panel System & security System

Device manager COM & LPT.

4) Set max/min Baud rate to baud rate the same as the COM port. If it

is not success. Try lower baud rate, say 1200.

5) Select On-Clip R/C clock

6) Turn off MCU power

7) Press ISP programing button


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8) Turn on MCU power

9) Wait…

For PzISP

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5

1 2

3


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1) Select MCU type

2) Set COM port

3) Set baud rate to the port setting. Use low speed download. If it is not

success in later step, try 1200 here.

4) Open *.hex


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5) Turn off the MCU board.

6) Download program

7) Turn on the MCU board just after press the download program button.

8) You should see the following screen.

Programming STC MCU

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