MITS 2SIO serial chip?

From: Richard Erlacher <>
Date: Mon Dec 17 23:50:31 2001

see below, plz


----- Original Message -----
From: "Ben Franchuk" <>
To: <>
Sent: Monday, December 17, 2001 3:35 AM
Subject: Re: MITS 2SIO serial chip?

> Richard Erlacher wrote:
> >
> > It's a Western Digital part, and the SMsC people don't have a sheet on it
> > either. You can buy them from Rochester Electronics, however.
I mentioned this only because SMC (later SMsC) made licensed replicas of most of
the WD FDC parts and sold their all-digital technology to Western.
> > Dick
> If it was replacing the part that would be no problem. However
> not having a datasheet sheet makes designing impossible. Unless
> the have a built in fifo or don't need tweaking (I have no scope here)
> I will stick with the parts I have. Thank you for this information.

There's nothing to tweak, since it's all-digital, and, eventually, but not this
week, I can probably send you a scan or a PDF of the datasheet. The original I
have is a preliminary, but I might still have a datasheet from the ChipCenter or
Freetradezone. What I really like is that there is no need at all for cable
drivers, since the interface lines are intended for direct connection. All you
have to do is synchronize your CPU/DMAC to the data acquisition loop and then
roll. If you're slow, you may want to use wait-states, but if you have no
dificulty getting around a 13.5 microsecond loop (the first pass only) and 16
microseconds per byte, then you're in.

> --
> Ben Franchuk --- Pre-historic Cpu's --
Received on Mon Dec 17 2001 - 23:50:31 GMT

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