Introduction
Microcontrollers (uC's) have been around for quite a while now. With
relatively few I/O lines, a limited instruction set and almost no peripherals
they are far better suited for control applications than uC's such as 8051,
6800, etc.
Data Sheets may be obtained from their website
atmel.com.
These kits use a computer serial port for communication. Using the serial
port has several advantages:
- The programmer does not require special software other than a terminal
emulator program. Windows 3.11 & 95/98 come with this program (Terminal
and HyperTerminal) built-in. You may download our own
Term.zip from our website.
- It allows the programmer to be used with any computer and operating
system.
The Atmel devices have a number of advantages:
- Flash technology. No need for EPROMs, UV erasers and OTPs.
- Software compatible with the industry standard 8051.
- The 8051 family has been around for years and a vast library of
software is available such as assemblers and simulators. Even code fragments
for doing things such as initialising the serial port or BCD arithmetic
are also available.
OPERATION & USE
Connect the programmer to the serial port of a PC or other host using
a "straight through" 9 pin cable. Start a terminal emulation program (telix,
procomm etc) running at 9600 baud, 8 data bits, 1 stop bit and no parity
bit.
For Windows3.11 use Terminal. In Windows 95/98 you can use Hyperterminal.
Use TTY emulation, no flow control. Save As K3121.ht. Apply power to the
programmer. Press Reset if necessary. A menu should appear and both LEDs
should be off. The programmer is ready for use. If the menu does not appear
check the above specifications. Check that the com port is correct.
We provide a simple DOS-based terminal program
Term.zip. Also, there is a
batchfile for kit 3121 to help automate
volume programming anda utilities
file for kit 3123
You may modify these to suit your requirements.
NOTE: Do not insert or remove ICs in the programming socket until the
programmer is powered up. Once powered do not insert or remove ICs until
both LEDs are off.
The programmer has six command functions:
P ............... Program code data
R ............... Read code data
V ............... Verify code data
L ............... write Lock bits
E ............... Erase chip
B ............... Blank check
Insert a chip into the programming socket and choose an option. The programmer
first attempts to identify the device and prints an error message if unable
to do so. If all is well the function will be carried out and a message
printed on completion. Before programming a chip it should be blank checked
and erased if necessary. When programming or verifying data the user will
be prompted to send a file to the programmer. The file must be in Intel
HEX format and is transmitted using an ASCII or text transfer protocol.
If an error occurs while programming or verifying, an error message will
be printed and the programmer will stop. The VCC LED will remain on.
The user will be prompted to press the reset switch. The usual programming
sequence will be E B P V L. In HyperTerminal use Transfer/Send Text File
after P tells you to Send file. (The text file in this case will be a *.hex
file.) VPP will flicker on/off during programming. When you Send file for
Verification VPP will not flicker. If all is OK both LEDs will go off. L)ock
the code.
Note: The "verify" function must be performed BEFORE writing the lock
bits. Writing the lock bits prevents the code from being read out. All data
will read as 0FFh and verification will fail. When reading data the programmer
converts the data into an Intel HEX file before sending it to the PC. The
user should turn on text capture before starting the read function so that
the data can be saved to a disk file.
Contact Technical Support
You can email us for help with this kit at:
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