KANDA STK300 User manual

Copyright © Kanda 2013 1
STK300 AVR Starter Kit Manual
Kit Contents
•STK300 Board
•Atmega128L device mounted on a KANMEGDEV board
•AVRISP-U USB Port In System Programmer (ISP)
•Software CD and AVR Datasheets CD
•JTAGAVR
The only extra item required is a power supply – see Power Supply section for details
about suitable power supplies.
Installing Software and documentation
The CD contains an executable file – Kanda AVR.exe. Run this installer and it will copy
all the documentation, sample code and software to your PC.
The default install folder for Kanda software and documentation is
C:\Program Files\Kanda AVR
You also have the option in this installer to install WinAVR C Compiler and AVR Studio
development environment. We recommend that you do install these unless you already
have them on your PC.
There are three main pieces of software:
•AVRISP – This is the programmer software, used for transferring code from the PC
into the AVR device on the board. To install the software Double Click the EXE file
and follow the on-screen install instructions.
AVRISP has a Documents folder that contains PDF files with useful information about
AVRISP.
•AVR Studio - AVR Studio is a complete development system for AVR devices,
supplied by Atmel. It is probably the best available for any microcontroller. This
environment is where you write new programs, and assemble them for the AVR chip.
It also includes a Simulator for stepping through your code to debug it. The
documentation folder includes instructions on using AVR Studio.
The installer allows you to install AVR Studio. The default install path is
C:\Program Files\Atmel\AVR Tools\AVR Studio

Copyright © Kanda 2013 2
•WINAVR - WINAVR is a C Compiler for AVR microcontrollers. Run the installer if you
want to use C language for your AVR development. Documentation is included.
WinAVR will be automatically linked to AVR Studio.
Summary
The only software you need to install to start with are AVRStudio for code development,
WinAVR if you want to write in C and AVRISP for programming AVR devices on the
STK200 board. The other software and documentation is available if you need it.
AVRISP will be integrated into AVR Studio if AVRStudio is installed first. The
Kanda installer does this by default.
Getting Started
AVRISP is the In System Programming software, AVRStudio is the development
environment and the STK300 board is the test platform. Most people prefer to connect
up the hardware and program some sample files on to the board using AVRISP, before
tackling writing code in AVRStudio. However, it is up to you.
There is also a book in Kanda AVR folder called Get Going with… AVR, another good
place to start.
The rest of this manual describes how to connect the hardware and use AVRISP. This is
followed by a description of the STK300 board and finally by a brief introduction to
AVRStudio.
The only software you need to start with is AVRISP and AVR Studio. The rest can be
used later if you want to experiment.
Connecting the hardware
Run Kanda AVR.exe from CD BEFORE connecting hardware
1) Connect the ISP dongle to the USB port on your PC. Windows should automatically
install the USB drivers. If it does not install correctly, please see troubleshooting
guide: C:\Program Files\Kanda AVR\AVRISP-U\ Troubleshooting USB Driver
Install.pdf
2) Connect the ISP lead to the dongle
3) Connect the 10-way ISP lead to the STK300 board – see diagram.

Copyright © Kanda 2013 3
Make sure you use the correct header on the STK300 board – it is the box header next
to the 9-way D-Type connector and power input.
Power Supply
4) Connect a power supply to the board. The connector type required is 2.1mm barrel,
centre negative or centre positive. It can be 7-12VAC or 9-15VDC, with a current
capacity greater than 300mA.
AVRISP software
Now run the AVRISP software
•A Green Light should appear at the bottom of the screen with the message ISP
Initialized : Detected Device Atmega128
If a RED light appears on the status line, then check the following
1) The AVRISP is connected to the board as shown above
2) The board is powered
3) AVR appears in Programmer box at top of screen
On/Off
Switch Power Connector
RS232
Connector Programming
Interface
Port Headers

Copyright © Kanda 2013 4
Load File
Once the board is connected properly, the next step is to load a file into the buffer. All
operations are carried out on the data in the buffers. There are two buffers, one for code
– Flash and one for data – EEPROM
Go to File Menu and choose Load > Flash, and select a file such as Samples > STK300
> LED Flash > LEDflash.hex
To load EEPROM data, follow the same procedure or type data directly into the buffer, in
Hex numbers or ASCII characters.
Programming the AVR
All operations on the AVR chip are carried out from the Device Menu.
Note: AVR devices must be erased first if they have been programmed before.
To program and run the example file we have loaded into the buffer on to the STK300,
1) Choose Device > Erase
2) Choose Device > Program > Flash
3) Choose Device > Run – Run releases the chip from ISP so it can run its code
The LEDs on the board should begin to flash. Follow this procedure to program other
code into the AVR on the STK300 board.

Copyright © Kanda 2013 5
AVR microcontroller default fuses
New AVR devices come with the Clock Source set to RC Internal Oscillator by default.
The actual speed of the oscillator varies from 0.5MHz to 4MHz depending on the device.
This means that programs will run slower than expected, because the AVR is NOT
running from the 8MHz clock on the STK200 board.
To change the Clock source, go to Fuses and Lockbits tab and change CLKSEL fuses
from Internal Oscillator to External Crystal/Resonator 3 – 8MHz (1110, 1111). Then go to
Device menu > Program > Fuses.
Other features of AVRISP
Auto Program
It can get a bit tedious carrying out all these steps individually, especially if you want to
check that the code has loaded properly (Verify) and program the EEPROM as well. This
is where Device > Auto Program (F5 key) is useful.
To use Auto Program feature, first go to Device > Auto Program Options and set the
operations you want to carry out. Now selecting Device > Auto Program or pressing F5
will carry out all these operations.
Fuses and Lockbits
Click on the Fuses and Lockbits Tab to view the Fuse screen. These are settings on the
Atmega128 that can be altered to affect the way the device runs and interacts with the
circuit.
The default fuses will work happily on the STK300 board, but you may want to alter them
to make the clock run from the 8MHz crystal on the board. Leave JTAGEN checked to
use emulator. Full descriptions of each fuse and what they do are in the device
datasheet – see Documentation > AVR Datasheets folder on CD for the datasheet on
Atmega128.
On the right of the Fuse screen is a second tab marked Lockbits and Boot Options. This
screen displays the various security settings and block options available. Again, these
are described in the Atmega128 datasheet.
Status
The Status Tab lists the operations that have been carried out during the current
programming session.
Serial Numbers
Serial numbers can be added to the Code space (Flash) or Data Memory (EEPROM) in
a variety of formats. If Auto Program is used, the serial number will increment with every
Auto-program cycle.
View Menu
CRC Checksums
This gives the checksum calculations in different formats for the whole buffer or just the
used buffer. Applies to both Flash and EEPROM

Copyright © Kanda 2013 6
Pop-up Warnings
This displays a message box if there is a verify error. Useful if repeated Auto Program
operations are carried out, when it can be easy to ignore errors.
Setup
This can also be selected by clicking the Setup Button. It covers a variety of settings,
which are not needed on STK300 board, except Communications Device. This is
needed if you have multiple parallel ports when you should select the correct LPT port.
The other settings are mostly for use on your own circuits, and are described on the
screen.
Reset Button
This is used to Reset the AVR on the board. This is a way of resetting communications if
errors occur or the programmer cannot find the chip.
STK300 Board Description
The schematics of the board are available in the Documentation > STK300 folder on the
CD.
Voltage Selection
There is one jumper – JP1 – for setting the board voltage. If the jumper is on, the board
operates at 5V. If it is off, the board operates at 3.3V.
Notes:
1) If the board is set to 3.3V, the brownout circuit should be set to 2.9V by removing
JP2
2) The ISP interface is supplied with 5V regardless of the board voltage.
3) The Atmega128L supplied as standard can operate from 2.7-5.5V
Brownout Circuit
The STK300 has a brownout detector to reset the AVR if the voltage drops too low. The
brownout level is set using JP2 and should match the voltage selected by JP1 i.e. JP1
and JP2 both off or both on.
Clock Circuit
The board uses an 8MHz crystal connected to a 74HC00 external clock chip. The clock
signal is connected to XTAL1 pin on Atmega128.
Serial Ports
The Atmega128 has two hardware USARTs. Both are connected through a MAX202
chip to give RS232 level signals.
USART0 (RXD0/TXD0) is connected to the female 9-way D-Type connector.
USART1 (RXD1/TXD1) is connected to a 2-way pin header, labeled COM2.
Both USARTs are also available, at TTL levels, on the expansion headers on the edge
of the board (UART0 on PE0, PE1 and UART1 on PD2, PD3)
Details about Baud Rates, control and other settings are in Atmega128 datasheet.

Copyright © Kanda 2013 7
Expansion Headers
All the device port pins are brought-out to pin headers on the edge of the board. The
layout of these connectors is shown below.
All the ports are available - Port A to Port G – and all have the same layout except Port
G. Port G is a smaller port and not all pins are brought-out because they are used by
RTC circuit – see Port G section.
Port F is used by the ADC functions, and should be used in conjunction with the Analog
header if Analog to Digital function is used.
ADC Circuit
The ADC circuit uses Port F and the 4-way Header marked Analog.
To use the ADC with the Internal Reference Pot, the jumper between AREF and POT
pins on Analog connector should be on.
To use an external reference voltage, remove jumper and connect voltage to AREF and
AGND pins.
Port G header
Port G only has 5 pins. Of these, PG3 and PG4 are used by Real Time Clock (RTC)
circuit so are NOT brought out to header. In addition to PG0/WR, PG1/RF and PG2/ALE,
this header has Reset and a VCC and GND Pin.
0
2
4
6
GND
1
3
5
7
VCC
Edge of Board

Copyright © Kanda 2013 8
Real Time Clock
A 32768 Hz crystal is connected to TOSC1 and TOSC2 pins - Pin 19 and Pin 18. These
pins are also Port pins PG3 and PG4, but are not connected to the expansion headers.
This crystal can be used to generate a 1 second pulse by setting Timer 0 to
Asynchronous Operation - see Atmega128 data sheet for details
JTAG Header
The board has a second programming/debugging interface next to the mounted AVR
chip. This connector should NOT be used for normal ISP operations
It has the recommended Atmel JTAG Interface pin-out and can be used with JTAG ICE
tools, such as the Kanda JTAGAVR, which will plug straight in, without adapters. Kanda
AVRUSB programmers, with JTAG adapter fitted, can also use this connector.
LCD Circuit
The 14 x 1 header marked LCD is for a standard 2 X 16 character LCD. The
connections are shown on the board and in the following table. LCD display faces out
1 RD
0 WR
GND
2 ALE
RST
VCC
Edge of Board

Copyright © Kanda 2013 9
Connection
Name Function
0V Ground 0V
+5 Vcc - must be 5V
Vo Contrast
RS Register Select- A14
Wr Not Write
EEnable
D0 Data Bit 0
D1 Data Bit 1
D2 Data Bit 2
D3 Data Bit 3
D4 Data Bit 4
D5 Data Bit 5
D6 Data Bit 6
D7 Data Bit 7
The board is designed for use with an LCD with a Hitachi driver chip built-in, with a
contrast pin voltage of 0 to 5 Volts. If no characters appear on LCD, then you may need
to change resistors R22 and R23 to alter the contrast voltage, especially if you use a
different LCD.
This board is not designed for use with back lit LCD modules, so the extra connections
needed are not included and the power supply will not supply the current required.
The LCD can be driven in Memory Mapped or I/O Mode - see data sheet. If the crystal
has been changed to a faster crystal frequency, memory mapped operations will not
work.
A suitable LCD is available on the Kanda site (http://www.kanda.com/go/570910-PM)
A sample file is included on the CD in Samples directory.
External Memory
The board is fitted with sockets for an address latch (74HC573) and a Flash RAM chip
(29C256).
These are available as a pair from Kanda –
http://www.kanda.com/go/STK200-RAM
STK200 or STK300
Board
LCD
LCD Connector 14 x 1
LCD mounted outside the board

Copyright © Kanda 2013 10
29C256 Pin-outs
24C EEPROM Socket
The board is fitted with a socket for 24C EEPROM Chip. This is an I2C device, or in
Atmel speak, a Two Wire Serial Interface (TWI).
The socket is connected to Pin 25 and Pin 26 of the Atmega128. These are SCL and
SDA pins or PD0 and PD1.
The socket layout is shown below.
A full description of the TWI is given in the Atmega128 datasheet. Pull-ups must be
enabled on these lines.
Switches and Bar LED
There is a 10-way bar LED fitted to the board.
•One LED is Power (labeled ON), and should be on when the board is powered.
•The next LED is labeled ISP and should be on when the board is in ISP mode.
Note: The Atmega128 will not run its code if the board is in ISP mode. To exit ISP,
choose Device > Run command or disconnect the ISP lead from the board
•The other 8 LEDs (0-7) are for user code. They are active low (0 switches them On),
and they are connected to a 10-way header marked LED’S. A short 10-way lead