PSOP44 from Sivava for AM29F400BB

By: gooroo - 2007-12-20 13:21:20

I have a 3.1ath willem and a PSOP44 adaptor from Sivava. the adaptor is supplied with an 8 pin ribbon cable. The connections on the adaptor are labeled clk,a19,a20,a21,a22,p1,a19,a23. My willem only has a 7pin header labeled a18,?,a19,a19,a20,a21,a22.

The pin I have listed as ? is not marked but following the track it ends up on another 3 pin header labeled "normal, 29x040"

Does anyone know if the sivava adaptor is compatible with the 3.1ath and if it is which pins do I need to link to make it work?

Regards, Simon

Re: PSOP44 from Sivava for AM29F400BB

By: DL - 2007-12-20 15:13:57

Hi Simon,

The Sivava adapter should be compatible with ATH3.1SS, but you'll need a different cable for connecting high order address lines to the programmer.  For AM29F400, all signals you need should come from the 32 pin socket so you don't need any address lines connected.  The bottom 3 pins on your 7 pin header determine what signal is routed to the 3 pin header.  The 3 pin header controls whether A18/19 or VPP gets routed to pin 1 on the ZIF socket.

HTH,
Dennis

Re: PSOP44 from Sivava for AM29F400BB

By: gooroo - 2007-12-20 16:10:14

Thanks Dennis for the prompt reply

The datasheet for the 29F400 says pin 1 is NC, so that being the case i should not need the connector cable or worry about the a18,a19,vpp 3 pin header....

Plug & Play, lol

Now just try and get the thing ID'd

Re: PSOP44 from Sivava for AM29F400BB

By: gooroo - 2007-12-20 16:50:42

Right cant seem to ID, not sure if I should be able too though. Can read and get a buffer of what appears to be good data. Try to verify and it fails in various random locations with each attempt.

PSU is 19V regulated laptop supply...

Any suggestions?

Regards, Simon

Re: PSOP44 from Sivava for AM29F400BB

By: DL - 2007-12-20 18:40:17

Hi Simon,

I tried my PSOP44 adapter with an ATH3.1SS with 0.97ja and didn't have any problems with ID, read, erase, or program; other than being slow.

What program version are you using?  Pull-up resistors should be added for 0.97ja.  Without them, some have timing problems.  0.97g is slower and should work without them.  In one case, someone was having address generation problems with 0.97g that was fixed by adding the resistors.

Has your programmer worked with other devices?

HTH,
Dennis

Re: PSOP44 from Sivava for AM29F400BB

By: gooroo - 2007-12-21 09:31:02

Dennis, thanks for all you help!

0.97g did the trick, so I guess I do need the pull up resistor mod as I was using 0.97ja

Thanks again, have a great Christmas and a happy new year!

Regards, Simon

Re: PSOP44 from Sivava for AM29F400BB

By: DL - 2007-12-21 15:42:10

Hi Simon,

You can add the resistors to pins U4-12 and U4-14 on the solder side of the board.  If you use 1/4W resistors, U3-16 is a convenient place to get VCC.  Something around 10K will do; I use 9.1K-12K, whatever is handy...

HTH,
Dennis