Re: [Discuss-gnuradio] transmission buffer

[Matt Ettus]

Oussama Sekkat wrote:
> Hi,
>
> I am looking at the transmission buffer (tx_buffer.v) verilog code. So
> it seems that it uses two clock signals. the txclk signal is used to
> read from the fifo_4k while the usbclk signal is used to write to the
> fifo_4k.
> What are the clock speeds for those clock signals?
> I believe I read in a previous email to the mailing list that the
> master_clock runs at 64MHz. Is that correct? Also, it appears to me
> that the master clock does not come form the GPIF bus of the USB
> controller. Where does that signal come from? Is it just an on board
> clock?
> What is the speed of the usb clk?
>
> Thank you ahead of time for any clarification on the matter.
The USB clock is 48 MHz, provided by the FX2