'ITU PIC PROGRAMMER'
I am a beginner with the pic and I just bought the ITU programmer. I want
to program 16C74's for a car starter but I don't know what the correct pins
to hook up from the programmer to the 40 pins. Could someone pass along the
information please? Thanks in advance.
Martin J. Maney
On Tue, 19 Dec 1995, MORBIUS wrote:
> I am a beginner with the pic and I just bought the ITU programmer. I want
> to program 16C74's for a car starter but I don't know what the correct pins
> to hook up from the programmer to the 40 pins. Could someone pass along the
> information please? Thanks in advance.
If you don't have the pinouts for the C74 you're going to need to get all
of them anyway, so I shan't list the pin numbers here. The connection is
really very simple: you just connect the five lines from the ITU header
to the corresponding pins on the 40-pin socket. I believe the only trick
bit is that there are two ground and (if I recall) two supply pins on the
C74, so the ground and +5 lines will go to two pins each.
Frankly, if this isn't sufficent description I would strongly suggest you
send ITU the money for an adapter kit (assuming they include a small PCB
to mount the socket and cabling to run to the header it's probably not
worth the time and trouble even if you do know exactly what you're doing).
The only problem I had was that the programming would fail after writing
the first few words until I replaced the 100 ohm resistor (R11) with a
much smaller value (I used 12 ohms as i had that on hand). Perhaps this
varies from PIC to PIC, but I had identical problems with two 16C73 chips.
Attach the following wires from the header on the programming board
to your 40 pin socket. The Aries 40 pin socket is ideal, since it
will also handle the 28 pin .3" spacing packages.
The header is marked 1-5 on the schematic, and pin one is the pin
closest to the bottom edge of the board.
Header pin 1 to socket pin 40
Header pin 2 to socket pin 39
Header pin 3 to socket pin 32
Header pin 4 to socket pin 1
Header pin 5 to socket pin 31
You may want to insert a 0.1uF cap from pins 1 and 32 to ground.
Keep all wire lengths as short as possible.
We do sell an assembled adapter with a ZIF socket and flex cable for
$25. This is part of our introductory special pricing on the PIC-1
products which ends 12/31/95. The special price on the programmer
kit is $29 until the end of the month as well.
Good luck with your project,
Chris B. Sakkas (itutech.com) chrishttp://www.itutech.com
ITU Technologies (itutech.com) ftp://itutech.com sales
*** Complete PIC programming packages starting at only $29! ***
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'ITU PIC Programmer'
Can someone tell me if ITU's PIC programmer is worth getting? ..or can
you suggest a cheap PIC programmer to buy?
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