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- From: mdk@col.hp.com (Mark Keisling)
- Newsgroups: sci.electronics
- Subject: Re: Dumb/simple UART chips
- Date: 28 Jan 1993 17:42:29 GMT
- Organization: HP Colorado Springs Division
- Lines: 27
- Distribution: world
- Message-ID: <1k95u5INN6dc@hp-col.col.hp.com>
- References: <1k55dkINNe5b@digex.digex.com>
- NNTP-Posting-Host: hpctdjj.col.hp.com
-
- bote@access.digex.com (John Boteler) writes:
- >
- > Is there a dumb UART readily available?
- >
- > I am designing a box that sends out serial telemetry based on 8 switches
- > being ON or OFF. A serial interface looks like a good way to do it. I
- > don't need interrupts, I don't need FIFOs, I don't need modem status
- > bits, I don't need none of that stuff.
- >
- > I would rather not bump the level of complexity up several notches by
- > requiring a microcontroller (and its firmware) just to initialize the
- > UART speed and so forth. Is there a really dumb UART that can come up in
- > a known state and just shovel data? National Semiconductor's 16450/16550
- > data sheet lists the default state of all registers except the Divisor
- > Latch Register, which is the most important one for my application.
- > It would be nice if I could simply power it up and strobe it when
- > data is ready.
- >
- > Maybe I should be looking at the 65xx family?
- >
-
- Check into the Intersil/GE/Harris IM6402. Configuring the part is done
- by pulling pins high or low. You'll have to provide an external 16x
- clock. Jameco sells this part for $3.75. Its in a 40 pin DIP package.
-
- Mark.
-
-