Hello,
I'am trying to bring up a USB PHY board with TUSB1310A. It is supposed to ouput PCLK at 250M and ULPI_CLK at 60M. However on our board the PCLK is 75M and there is no ULPI_CLK (measured to be 0)
We are using a crystal of 25M, and the strap pin set as: XTAL_DIS(0), SSC_DIS(0),PIPE_16BIT(0),ISO_START(0), ULPI_8BIT(0), REFCLKSEL1(0), REFCLKSEL0(1)
PHY_MODE1(0), PHY_MODE0(1), we also pull down JTAG_TRSTN to 0.
the power on sequence is:
provide power on PHY (strap pins are init here) <- 200ms -> set OUT_ENABLE <- 180ms -> de-assert reset#
We tryed crystal of 25M with XTAL_DIS(0), REFCLKSEL1(0), REFCLKSEL0(1)
and clock of 40M with XTAL_DIS(1), REFCLKSEL1(1), REFCLKSEL0(1)
On both cases the PCLK output is 75M and no ULPI_CLK
Do you have any idea about it?
Best Regards,
Guang
