ICSP using a 16F84a to program 24CXX

[aftab]

If the programmer can do 24Cxxx types directly, then install a breakout header like you would for the PIC's ICSP, plug in and program like it was in the socket on the programmer.

I did that, but it does not work.

Do I need to do special coding (peek,poke,srout,...) to do an ICSP ?

Somewhere in JDM programmer, it says the voltage goes upto 13v.

I am no electronic geek - so do not understand much.

Any clue what might be the problem ?

Thanks
Aftab

[skimask]

I did that, but it does not work.
Do I need to do special coding (peek,poke,srout,...) to do an ICSP ?
Somewhere in JDM programmer, it says the voltage goes upto 13v.
I am no electronic geek - so do not understand much.
Any clue what might be the problem ?
Thanks
Aftab

You probably have to add another header or something to cutoff the outside signals going to the 24xxxx itself. You're probably trying to feed power/signals to the whole board, not just the 24xxx, PIC fires up, signals start interfering with each other, etc. Try pulling other chips out, etc.
The JDM programmer voltage is only for the PIC (or maybe other MCU's). 13v would most likely kill a 24xxx.

[aftab]

You probably have to add another header or something to cutoff the outside signals going to the 24xxxx itself. You're probably trying to feed power/signals to the whole board, not just the 24xxx, PIC fires up, signals start interfering with each other, etc. Try pulling other chips out, etc.
The JDM programmer voltage is only for the PIC (or maybe other MCU's). 13v would most likely kill a 24xxx.

PP 11 of this:
http://ww1.microchip.com/downloads/e...Doc/31028a.pdf

Shows some driver board - would that be helpful ?

Thanks
Aftab

[skimask]

PP 11 of this:
http://ww1.microchip.com/downloads/e...Doc/31028a.pdf

Shows some driver board - would that be helpful ?

Thanks
Aftab

Have you got the datasheet for the 24xxx handy?

[aftab]

Have you got the datasheet for the 24xxx handy?

Hello,

I have the data sheet for 24cxx.

I think i2c uses very few commands to communicate. Like start,stop, ack, etc.

I came across an article by Jonathan Zacharko in the board of Reynolds Electronics. It shows how to communicate with DS1624 using I2c(dont have the URL, I had googled it and printed in ms word without url). It is interesting.

Just to start - I need to send a few bytes or just "A" to it and write it using the i2c protocol.

Trying for that and will try to post my progress - meanwhile any suggestion would help me.

Thanks - and thanks for so quick responses.
Aftab.

The URL is:
http://www.rentron.com/PicBasic/i2c_communication.htm

[skimask]

Now I guess I don't know what you really want...you start off talking about 24xxx eeproms and now throw a DS1624 into the mix.
What do you really want here?

[aftab]

Now I guess I don't know what you really want...you start off talking about 24xxx eeproms and now throw a DS1624 into the mix.
What do you really want here?

I only want to program 24Cxx. The DS1624 is just an example.

I was able to program the 24C04 ic as shown in manual. But I cannot do it in ICSP mode. The example with DS1624 shows how to read/write(?) in ICSP mode(?).

So, for now need to figure out how to program the 24Cxx using i2c commands - as i2cwrite does not seem to work in ICSP mode.

Thanks
Aftab.