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AnthonyArrowRoc
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USB3 GEN1 Bus interface:  I’m using the CX3 in USB2.0 interface/mode only.  Questions:

    1. Is there any concern about using CX3 in USB2.0 (480mbps) only?
    2. How the USB3 signals ,SSRX+/- and SSTX+/-, should be terminated?  Floating all, or floating SS-TX and terminating SSRX with resistors?  Please detail.

Max power consumption: Please let me know max possible power consumption (current) for the following rails:

    1. VDDIO = powered by 1.8V. max current?
    2. VDDIO2 and VDDIO3 = powered by 3.3V. max current?
    3. VDD-MIPI, VDD, AVDD, U3TXVDDQ, U3RXVDDQ = powered by 1.2V. max current?
    4. CVDDQ = powered by 2.5V. max current?

Clocks:

1. CX3 REFCLK, pin F2, is driven by oscillator PN SIT1602BC-72-18E-19.200000 (25PPM).  Any concerns about using this oscillator?

2. CX3 CLKIN, pin D7, is driven by oscillator SIT1602BC-72-25E-19.200000 (25PPM). Any concerns?

3. CX3 CLKIN-32, pin D6, is tie to GND. We are not driving this clock.  Our application is not using the Watchdog Timer function, UART or I2S.  However,  the I2C and SPI communications are utilized. Any concerns about not driving CLKIN-32?

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AliAsgar
Moderator
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1000 replies posted 250 solutions authored 750 replies posted

Hi,

Please refer to https://www.infineon.com/dgdl/Infineon-AN70707_EZ-USB_FX3_FX3S_SX3_hardware_design_guidelines_and_sc... application note. 

Let me know if this application note does not answer any of your question.

Best Regards,
AliAsgar

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AliAsgar
Moderator
Moderator
Moderator
1000 replies posted 250 solutions authored 750 replies posted

Hi,

Please refer to https://www.infineon.com/dgdl/Infineon-AN70707_EZ-USB_FX3_FX3S_SX3_hardware_design_guidelines_and_sc... application note. 

Let me know if this application note does not answer any of your question.

Best Regards,
AliAsgar

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