I'm making an LED message board with 8x8 LED matrix (8 of them), using one 8bit port for the cathode on the anode side I'd like to be able to pulse a pin and have a counter increment up to 64 then reset, in this way I'll only use 1 pin and get my desired effect, the 4017B looks good but I don't think I can gang them together on the other hand I thought about using 74HC244 and toggle the enables on and off for each IC (8 of them), this would use another 8 bit port and either another 8 bit port for enables or 4 pins and another chip to decode BCD.
Does anyone have any elegant ideas?
btw I'm using a PIC16F877 (3 8-bit ports 1 5-bit port and 1 3-bit port)
If I can move to a smaller part after the prototype is made I'd like to do this also having the USART available would be helpful (on one of the 8-bit ports).
Ron
Does anyone have any elegant ideas?
btw I'm using a PIC16F877 (3 8-bit ports 1 5-bit port and 1 3-bit port)
If I can move to a smaller part after the prototype is made I'd like to do this also having the USART available would be helpful (on one of the 8-bit ports).
Ron