20 Dec
2007
20 Dec
'07
12:56 p.m.
On Thu, Dec 20, 2007 at 01:44:50PM -0600, Jim Brain wrote:
That place appears to be expensive, but it's probably a function of
how long ago they stopped making the TR1602 and how much surplus vendors
get for 'just the right part'.
For a new design, I would still recommend the IM6402. It's still available
If you
don't want programmable logic, an 8251 or 8250 isn't going to
be what you want. Try a TR1602 or TR1865 or any of the other
"hardwire" UARTS--set parity, data bits, etc. by connecting
appropriate pins to Vcc or GND; put the serial data in on one pin and
take the parallel data out on 8 pins. No programming needed.
Wow, that's a lot to pay for a hardwire solution:
http://store.americanmicrosemiconductor.com/tr1602.html
A TINY2313 AVR will do the job in a single IC for a few bucks. Heck,
I'd even program it for you if you told me the specifics (how to signal
that a new byte as arrived, for example)
Maybe if you have a TR1602 lying around, or maybe that place is ultra
expensive. from a number of places...
http://www.bgmicro.com/index.asp?PageAction=VIEWPROD&ProdID=10738 - $2.45
-ethan
--
Ethan Dicks, A-333-S Current South Pole Weather at 20-Dec-2007 at 20:50 Z
South Pole Station
PSC 468 Box 400 Temp -8.0 F (-22.2 C) Windchill -30.4 F (-34.7 C)
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Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html