Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Multiple PWM on MAX II EPM240T100C5N for LED driving

Dear all, I am considering using the EPM240 in my design to control 15 RGB LEDs with independent PWM for R,G,B and also read a few switches states (so, read some CPLD input pins). The 15 R...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

The least resource requirement cant be expected comparing for equal and setting a register. Each LE has a 4-input LUT, one input for carry and three for data. So a 8 bit compare will need 5 or 6 LEs. The easiest way to understand the implementation is to compile a Quartus design and check the gate-level (post-mapping) netlist.