Clock replacement

[nad]

Originally Posted by Andrew Eckhardt

rats

That's an old IC. I can't get data on that, so I can't even tell you which pin is the input or output of the internal osc. You'll need someone that knows.

Found a basic diagram here: http://www.toshiba.com/taec/componen...94A5460MFG.pdf

Shows pins 23/24 in/out.

[Andrew Eckhardt]

I'd wipe both pins clean of passive components and inject at pin 23. Possibly the AND gate can tri-state allowing clock injection at the "output" (usually there would be a blurb about that in a real datasheet) but without more info I can't say. In any case nothing will break if you inject at the proper voltage at the input pin. EDIT: That other side of the AND gate is probably being fed by a reset control line, so you'd want to inject at the input anyway so that still works. I figure...

[nad]

Originally Posted by Andrew Eckhardt

I'd wipe both pins clean of passive components and inject at pin 23. Possibly the AND gate can tri-state allowing clock injection at the "output" (usually there would be a blurb about that in a real datasheet) but without more info I can't say. In any case nothing will break if you inject at the proper voltage at the input pin.

Thank you, that's exactly the reply I was looking for. Just need to order the psu and off we go. I was waiting a reply as I accidently 'broke' one of the tiny ceramic caps and wondered if I needed to replace it, then find out what value it was (bit burnt), then order the parts...... etc etc

Thanks,
Ant