DS160PT801: DS160PT801ACBR

Hi Tony,

Here are a few comments on your design:

• The TX AC coupling is correct, but the arrows on retimer TX channels look to be pointing toward the retimer, while the arrows on RX channels look to be pointing away from the retimer. To clarify, is the signal in your schematic going from the GPU to the retimer RX channels and from the retimer TX channels to the GPU?
• For the REFCLKOUT, make sure that each output uses a 33 Ω resistor in series for proper operation. Leave it floating if not used.
• For ADD0, ADD1, MODE, RX_DET, and WIDTH pins, make sure to utilize the correct pin strap settings. It looks like you are currently using 4.7k Ohm resistor to 1.8V, is this a placeholder resistor value?
• For EE_CLK and EE_DAT pins, an external 2 kΩ to 5 kΩ pull-up resistor is required
• Just to note - for JTAG pins, pull-down using 1 kΩ to GND if JTAG boundary scan feature is not used

Best regards,

Greg

Hi Greg

Thanks for the reply, and a few more questions

1. What are the specific requirements for the power supply ripple and the number of filter capacitors used in each power domain, and how much does the capacitor package need to use?
2. If refclkout is not used, can it be grounded with 33 ohm resistance?
3. What is the specific function meaning of add0, add1, mode, rxdet, and witdh, and what is the difference between pulling up and down resistors and floating in the air?
4. How many positions are there in the IIC configuration pin, and what is the corresponding IIC address?

Add a question 5.What is the specific function of ICC, and what is the difference between pulling up and down and floating?  6. JTAG does not use boundary scanning, must it be 1K grounded, 10K is OK?

Hi Tony,

I will look into these questions and answer as soon as possible.

Best regards,

Greg

Hi Tony,

To confirm, have you requested and received access to the full datasheet for the DS160PT801 device in the Secure Resources system? It has extensive information about pin functions.

1. The ripple requirements are detailed in Section 7.2, and there is a recommended power supply schematic in Section 10. 

2. The datasheet advises that REFCLK_OUT should be left floating if not used.

4. Table 8-1 of the datasheet details the configuration and number of possible SMBus target addresses

Details about your questions 3, 5, and 6 can be found in Table 6-1 of the datasheet that explains all pin functions.

Best regards,

Greg

Hi Gregory

 I applied for an interview but was denied.

Hi Tony,

I am not sure why your access was denied, as another team handles this. You can create a ticket through the Customer Support Center to see why this happened.

Best regards,

Greg

Hi Greg

 Does this chip come with a configuration by default? Whether firmware needs to be loaded？

Hi Tony,

There are two methods to configure the DS160PT801 that can be used in conjunction, register control via SMBus and automatic configuration via external EEPROM. The details of these methods can be accessed in the device Configuration Guide, which can be requested on the product page. 

Best regards,

Greg