I want to make an 8 by 8 rgb led screen and was wondering if a 20MHz avr would be fast enough. The idea is to read data from SD card and use binary code modulation (BCM) as described in http://www.batsocks.co.uk/readme/art_bcm_1.htm to update the display. I am hoping to get 10 - 24 fps (smooth movement) and no flickering. So say I aim for 20 fps and 10 BCM cycles per frame at 8 bit resolution. Thus to update the 4 ports controlling the leds and read data from sd card ill have 20 MHz / (20*10*8 ) = 12500 cycles. Is it realistic to do all that in so few cycles? Also I have not used BCM before, how many BCM cycles is required for no flickering?
Thanks in advance