Will USB still function with a clock frequency 7.84% low?
I need to program a Teensy 2.0 to act as a node in a multipoint RS-485 network running at 230,400 baud. But it seems I can not get this baud rate with a 16 MHz system clock--I can't supply an external clock in asynch mode. So I must run the oscillator at 14.7456 Mhz. To do this, I must change out the crystal. It looks like an NDK pn NX3225GA-14.7456M-STD-CRG-2 will drop in and work well with the 10 pF caps on the Teensy.
But does anyone know if USB will still function with a clock frequency 7.84% low? I'm looking into whether it's possible to run USB off the internal 8 MHz RC clock while the UART runs off the crystal, but it's still unclear to me.
Thanks.
I need to program a Teensy 2.0 to act as a node in a multipoint RS-485 network running at 230,400 baud. But it seems I can not get this baud rate with a 16 MHz system clock--I can't supply an external clock in asynch mode. So I must run the oscillator at 14.7456 Mhz. To do this, I must change out the crystal. It looks like an NDK pn NX3225GA-14.7456M-STD-CRG-2 will drop in and work well with the 10 pF caps on the Teensy.
But does anyone know if USB will still function with a clock frequency 7.84% low? I'm looking into whether it's possible to run USB off the internal 8 MHz RC clock while the UART runs off the crystal, but it's still unclear to me.
Thanks.