On Sun, Mar 12, 2006 at 03:36:18AM +0100, Dave Long wrote: > >A normal NTSC frame contains 525 lines, of which 485 are active. If > >you were to display 640x480 pixels, you'd need to emit a pixel 640 > >times in 52 microseconds, or once every 81 nanoseconds --- a dot clock > >of about 12 MHz. A microcontroller clocked at 20MHz would have a hard > >time keeping up with this; perhaps the 70MHz LPC2101 ($1.75 in > >quantity from Digi-Key) could cope, but it doesn't have enough RAM for > >a framebuffer, barely enough for an 80x24 character generator.
Notice that MuP21 managed to do video output with only 7 kTransistors. -- Eugen* Leitl <a href="http://leitl.org";>leitl</a> http://leitl.org ______________________________________________________________ ICBM: 48.07100, 11.36820 http://www.ativel.com 8B29F6BE: 099D 78BA 2FD3 B014 B08A 7779 75B0 2443 8B29 F6BE
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