Re: Backwards MuP21 chip
- Subject: Re: Backwards MuP21 chip
- From: Penio Penev <penev@xxxxxxx>
- Date: Tue, 29 Jul 1997 14:21:29 -0400 (EDT)
- cc: MISC mailing list <misc>
- In-Reply-To: <33DCE842.4D79@usa.net>
On Mon, 28 Jul 1997, Andrew Sieber wrote:
> Can anyone please verify that the notch and dot are correct, and the
> label is indeed upside down? Otherwise, I could really kick myself.
This is indeed the case -- the notch and dot are OK and are what you
should be looking at.
The test is fairly simple -- take a free floating P21, apply Vcc and Vss
to the respective pins with two clamps, ana monitor the activity on the
ROM and An pins with a third.
--
Penio Penev <Penev@pisa.Rockefeller.edu> 1-212-327-7423
