i'd like those schematics
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- To: ti-hardware@lists.ticalc.org
- Subject: TI-H: Port Expander I
- From: "Matt Butch" <mjb25@hotmail.com>
- Date: Mon, 13 Jul 1998 16:42:48 PDT
- Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
- Reply-To: ti-hardware@lists.ticalc.org
I have designed a port expander(PEI) for the TI link port. Features include: -Atmel AT90S1200 MCU -8 data lines. plus a another for misc use -3 address line, for connection of up to 8 modules -seperate power supply there will be 2 kinds of modules. The first will have it's own address decoder for plugging directly connecting into the Expansion Module Port(EMP), and the other will plug into a board that already has the address decoders onboard. If anyone is interested in the schematics drop me a line. It's a zipped file, and the pics are jpg. It might be hard to read since I drew them out on paper and then scanned them in. Port Expander II thes will have a 4414 or 8515 as it's controller. It will have 4-6 address lines for 16, 32, or 64(might be overkill and one hell of a power user but what the hell), and 26-28 data lines. Matt Butch ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com
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