Post by thread:OSD (ON screen display) via I2C line

Hello everybody, my first request on PICLIST ( a nice tool indeed) NEED : I try to display characters on a TV Screen. Details : I know the wonderful PICDREAM from alain FORT, but the 16F84 is too busy to receive Characters from outside . I try to use either a dedicated IC like SAA 5244 or 5246 from Phillips and be able to send Characters through a PIC using I2C commands. But I am not very familiar with SAA command (Videotext Unit) and I have trouble ... OR .... if you have another solution ... Application : I have a lot of need like that, first one is to display on TV the frequency from a frequency meter (PIC application). Thanks in advance for your help or suggestions Francois F1CHF (FRANCE)

Francois, I suggest you have a look at ST-Microelectronics' STV5730A. This chip is designed for putting text on top of composite video. It is used in VCR and set top box applications for character generation. It is easy to interface to a PIC with a simple 3 wire serial interface. Search http://www.st.com for the datasheet. Kayode. Dr O. K. Ayandokun, The BlackBoxCamera Company Limited, Unit U7, Lenton Boulevard, Nottingham, NG7 2BY, England. spam_OUTkayode.ayandokunTakeThisOuTvirgin.net Tel. +44 (0)115 9160684 Fax. +44 (0)115 9163491 For the latest in home security camera technology and the best ideas for using it visit http://www.blackboxcamera.com

> Francois, > > I suggest you have a look at ST-Microelectronics' STV5730A. This chip > is designed for putting text on top of composite video. It is used in > VCR and set top box applications for character generation. It is easy > to interface to a PIC with a simple 3 wire serial interface. Search > http://www.st.com for the datasheet. > > Kayode. > Anyone know of a hobbyist source for these(or any other single chip OSD)? Mouser only has them as a non-catalog item(minimum 84 pcs). Newark also has a minimum quanity.

In message <.....199912160112.UAA28868KILLspam@spam@elk1.elkhart.net>, Mike DeMetz <mikedKILLspamELKHART.NET> writes >> Francois, >> >> I suggest you have a look at ST-Microelectronics' STV5730A. This chip >> is designed for putting text on top of composite video. It is used in >> VCR and set top box applications for character generation. It is easy >> to interface to a PIC with a simple 3 wire serial interface. Search >> http://www.st.com for the datasheet. >> >> Kayode. >> >Anyone know of a hobbyist source for these(or any other single >chip OSD)? Mouser only has them as a non-catalog item(minimum >84 pcs). Newark also has a minimum quanity. I don't know any specific source, but I presume it is probably used in currently available equipment (VCR's and camcorders?), you be able to get them in single quantities through suppliers of spares for the TV/VCR trade. I used an NEC OSD chip, I got those from UK spares companies, they were used by both Amstrad (in satellite receivers) and Hitachi (in VCR's). -- Nigel. /--------------------------------------------------------------\ | Nigel Goodwin | Internet : .....nigelgKILLspam.....lpilsley.demon.co.uk | | Lower Pilsley | Web Page : http://www.lpilsley.demon.co.uk | | Chesterfield | Official site for Shin Ki and New Spirit | | England | Ju Jitsu | \--------------------------------------------------------------/