No, I need the lowest cost possible, beside that here in Brazil we can not get this kind of device. Octavio Nogueira Tato Equipamentos Eletr=F4nicos Ltda (11) 5506-5335 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D nogueira@tato.ind.br ICQ# 19841898 BASIC Step - O microcontrolador mais f=E1cil do mercado www.tato.ind.br ProPic tools - low cost PIC programmer and emulator http://www.propic2.com =20 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=20 -----Mensagem original----- De: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU] Em nome de Mccauley, Daniel H Enviada em: quarta-feira, 30 de abril de 2003 14:56 Para: PICLIST@MITVMA.MIT.EDU Assunto: Re: [PIC]:4x4&LCD in 1port (New challenge) You can get I2C type dip switches. They have up to 16 switch versions which only require only 2 ports for the I2C interace. > What about reading 16 dip switchs and > no LCD? I need to read 16 bits of configuration > with no additional chip. > How much pins could I save? > What would be the minimum pin arrangement? >=20 > Octavio Nogueira > Tato Equipamentos Eletr=F4nicos Ltda > (11) 5506-5335 = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D > nogueira@tato.ind.br ICQ# 19841898 > BASIC Step - O microcontrolador mais f=E1cil do mercado > www.tato.ind.br > ProPic tools - low cost PIC programmer and emulator > http://www.propic2.com =20 > = =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=20 >=20 > -----Mensagem original----- > De: pic microcontroller discussion list > [mailto:PICLIST@MITVMA.MIT.EDU] > Em nome de Dennis Crawley > Enviada em: quarta-feira, 19 de mar=E7o de 2003 00:59 > Para: PICLIST@MITVMA.MIT.EDU > Assunto: [PIC]:4x4&LCD in 1port >=20 >=20 > Hi all, > On Feb 10 2002, Mike Rigby, Edson, Wouter, Dwayne, > Jinx(don't you need > a haircut?=3D:), and many others, have proposed this challenge:=20 > to desing > a 4x4 matrix keyboard and LCD using only one port=3D 8 pins.=20 > Well, I have > read for fun that "three-days-ping-pong", and finally "the curiosity > killed the cat", so following Mike Rigby design I've arrived=20 > to a modest > solution > Features: > 1.- Only 7 pins and lets free RB0. > 2.- Use BF to detect internal operation. (saving an extra pin if it is > not > used) > 3.- Only 8 diodes as extra components. > 4.- Just take a look and tell me how to speed it up or generate a > decoder routine :) >=20 > Hard: > ; The PortB is used as follows: > ; RB0 FREE > ; RB1 LCD ENABLE > ; RB2 LCD R/W > ; RB3 LCD RS > ; < LCD DATA BUS > > ; D7 D6 D5 D4 > ; | | | | > ; RB7 ---------o------|-------|--|---------|-,--|-,--|-,--|-,- > ; | | | | 0|/ 1|/ 2|/ 3|/ > ; RB6 --o------|------o-------|--|---------|-,--|-,--|-,--|-,- > ; | | | | | 4|/ 5|/ 6|/ 7|/ > ; RB5 --|--o---|------|-------o--|---------|-,--|-,--|-,--|-,- > ; | | | | | | 8|/ 9|/ A|/ B|/ > ; RB4 --|--|---|--o---|--o----|--o---------|----|----|----|--- > ; _|_ | _|_ | _|_ | _|_ | C| D| E| F| > ; \ / | \ / | \ / | \ / | | | | | > ; _V_ | _V_ | _V_ | _V_ | | | | | > ; | _|_ | _|_ | _|_ | _|_ | | | | > ; | \ / | \ / | \ / | \ / | | | | > ; | _V_ | _V_ | _V_ | _V_ | | | | > ; | | | | | | |__|_________| | | | > ; |__| |__| |__|______________________| | | > ; | |__________________________________| | > ; |______________________________________________| >=20 >=20 > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.476 / Virus Database: 273 - Release Date: 24/4/2003 > =20 >=20 > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! email > listserv@mitvma.mit.edu with SET PICList DIGEST in the body >=20 -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.476 / Virus Database: 273 - Release Date: 24/4/2003 =20 -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body