Search found 3 matches

by MarkLeichty
Tue Dec 07, 2021 2:30 pm
Forum: NetBurner Hardware
Topic: Maximum DTnIN external Clock
Replies: 6
Views: 996

Re: Maximum DTnIN external Clock

Paul, Thanks for you help, I like your idea of using the compare on DTIN to scale the CPU clock, or use a GPS 1pps. I may use that technique in the future, but I now realize that the error in the temperature drift in the oscillator on the MOD54417 is much better than I thought, and the error in my a...
by MarkLeichty
Mon Dec 06, 2021 8:40 am
Forum: NetBurner Hardware
Topic: Maximum DTnIN external Clock
Replies: 6
Views: 996

Re: Maximum DTnIN external Clock

Paul, In the MCF4418RM document they mention in section 39.4 on page 39-12 under one of the bullet points for Initialization/Application Information they mention that DTnIN, the maximum value of DTnIN is 1/5 of the internal bus clock, as described in the device's electrical characteristics. This wou...
by MarkLeichty
Tue Nov 30, 2021 8:16 am
Forum: NetBurner Hardware
Topic: Maximum DTnIN external Clock
Replies: 6
Views: 996

Maximum DTnIN external Clock

When using the external clock as the source for a DMA Timer for a MOD54417 board is the maximum clock frequency for this source 25 MHz? I found one location in the Reference Manual were it indicated that the maximum frequency was (Fsys/2)/5. I have used the DTnIN external clock for a UART baud clock...