USB2ANY: USB2ANY

Hello Nir,

I need to confirm if the SPI speed adjustment changes this high time.  I expect so.  Is this not sufficient?

If you need more control, especially if you need to control this time for a specific register, you could...

1. Disconnect the USB2ANY source for CSB and (for example) RampCLK from the device as connected by default.
2. Connect RampCLK pin to CSB of the LMX2594 CSB input.
3. At the bottom of the User Controls page, set the RampCLK pin to Checked.
4. Then in the burst mode page, add the register you want to program.  Note that it adds a SetPins directive right after the WriteRawData command.  Since the RampCLK is now high, after programming the register, it will take CSB high as CSB would normally have done.
5. Add a delay for the number of seconds you would like.  Probably a fraction like 0.01.  Enter 0.01, then press the delay button.
6. At the bottom of the User Controls page, set the RampCLK pin to Unchecked.
7. On the burst mode page.  Click Set Pins to allow the pin to return low once again.

Not ideal and the latency as such may not be perfect, may it may serve your purpose.

73,
Timothy

Hello Nir,

The SPI interface uses a normally high CSB line.  So changing the data rate isn't going to have a change in high time.  The high time is more closely related to the request time through the USB.  If you want to control the high time through the setting of the SPI clock speed as described in the other thread, then you will need to change the interface type from SPI to UWIRE (microwire).  To do this...

As before, edit the file: C:\ProgramData\Texas Instruments\TICS Pro\Configurations\Devices\PLL + VCO\LMX2594\LMX2594.ini

Add the following line to the [SETUP] section as you added INTERFACE_SPEED.

SUPP_IFACE=SPI,UWIRE

Then when restarting the GUI, you will be able to select the UWIRE interface which has a normally low CSB, then it just goes high momentarily then back low again.  Here are some measured high times of the CSB line using the USB2ANY in UWIRE interface mode:

10 kbps = 66 us

400 kbps = 2.96 us

1000 kbps = 1.84 us

2000 kbps and above = 1.280 us

This is an alternative to the method I proposed above.

73,
Timothy

Hi Shay,

Little can we do to adjust the speed of USB2ANY. 

You have to either develop your own processor or use dedicated test equipment such as data/pattern generator.