What CLKFREQ do people use?

ericball

I am developing an alternate TV_text driver and I'm wondering what CLKFREQ people use in their projects?· I know that Coley and others have managed well over 120MHz, but I'm more interested in whether people use the Propeller at lower speeds - like 15MHz or less.

You see, in order to get under 20MHz I will have to make the code larger, but I'm not sure whether it is worth the effort.· Although at 20MHz, the code will only support ~16 characters per line.· Thus even if the code will support lower clock rates, does anyone want to look at a 10 char x 24 line display?


▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Composite NTSC sprite driver: http://forums.parallax.com/showthread.php?p=800114
NTSC & PAL templates: http://forums.parallax.com/showthread.php?p=803904

mctrivia

With a 5mhz crystal you can run at 4x to get 20. Normally run at 16x to get 80 but 1,2,4,8,16 are your choices

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
propmod_us and propmod_1x1 are in stock. Only $30. PCB available for $5

Want to make projects and have Gadget Gangster sell them for you? propmod-us_ps_sd and propmod-1x1 are now available for use in your Gadget Gangster Projects.

Need to upload large images or movies for use in the forum. you can do so at uploader.propmodule.com for free.

ericball

@mctrivia - I know the capabilities, the question is what are people using for their projects? Do people typically stick with 80MHz and higher, or do some people have projects where they use a lower clock rate?

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Composite NTSC sprite driver: http://forums.parallax.com/showthread.php?p=800114
NTSC & PAL templates: http://forums.parallax.com/showthread.php?p=803904

Leon

Slower clock rates are often used if there is a low power requirement.

Leon

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Amateur radio callsign: G1HSM
Suzuki SV1000S motorcycle