| ??? 02/12/04 14:51 Read: times |
#64611 - RE: Why? Responding to: ???'s previous message |
Oleg Sergeev said:
Why? Andy, could you explain, please? You obviously missed this bit in my original post: I said: ;-)
I'm asking as I want to limit the size of the divider chain from the 24MHz system clock. Oleg Sergeev said:
The upper refresh rate causes additional problems: MCU productivity goes low due refresh interrupt runs often and often Not in my case. I'm sure you won't be at all surprised to hear that I'm doing this on a Triscend E5, so the multiplexing is all done in the programmable logic and, therefore, has zero processor overhead! Oleg Sergeev said:
the high frequency produces high EMI... Yes, I realise that - I was wondering if the LED's themselves, or human vision artifacts, would impose any lower limit. Oleg Sergeev said:
After it all, why do you need to increase refresh speed? I don't need to; I was just wondering if there is any reason not to, as it could be useful to do so. In fact, I will do it at 9.6kHz - as I have a 9.6kHz clock knocking about anyway. |
