USB superspeed peripherals

[Anonymous]

In EZ-USB FX 3, a crystal is inserted between the XTALIN pin and the XTALOUT pin

It can be connected, or an external clock can be connected to the CLKIN pin

Although it is described in the data sheet, when connecting to XTALIN / OUT

Is it OK to connect the CLK IN terminal?

[SrinathS_16 · Accepted solution]

Hello,

The FX3 chooses the input clock based on the FSLC[2:0] pins. Although crystal and clock are connected, FX3 chooses one of those based on the FSLC[2:0] pin strap connection.

Best regards,

Srinath S

[Anonymous]

thank you for your answer.

As contents that I wanted to check

When input of XTAL IN is selected

Which of the following processes is correct for pin processing of CLK IN

※ PullUp or Pulldown or OPNEN

[SrinathS_16]

Hello,

When you are using XTALIN input, the CLKIN pin can be left floating (unconnected).

Best regards,

Srinath S

[Anonymous]

Thank you for your early reply.
I understand that it can be unconnected

Also, if there is a machine thank you for your consideration.

[SrinathS_16]

Hello,

Sorry if I had misunderstood your previous question. Can you please let me know what you mean by "machine"?

Best regards,

Srinath S

[Anonymous]

Is it about the use of machines that use devices?

[Anonymous]

There is content that you want me to check by adding 1 point

As a terminal for CYUSB 3014-BZXIT boot option
Below, when not using the function Which processing will be the terminal processing
※ Pullup or Pulldown or OPEN

· FX 3 boot option I 2 C
⇒ I2C_GPIO [58/59]
· FX 3 Boot Option SPI
⇒ GPIO [53/54/55/56]
· JTAG
⇒ TCK / TMS / TRST # / TDO / TDI

[SrinathS_16]

Hello,

- I2C lines need to be added with a pull up resistor recommended value being 2kohm.

- SPI lines and JTAG lines do not need a pull-up or pull-down resistor and can be left open.

Best regards,

Srinath S

[Anonymous]

OK. Thank you for your reply.