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TUSB544: type C-C active cable solution

Part Number: TUSB544
Other Parts Discussed in Thread: TUSB422

Hi team,


I would like to know some details about Type C to C active cable solution and need your help. Lenovo dock team is finding cable solution. We have promoted  TUSB544.


For C-C active cable solution(not Type C to DP/HDMI), I didn’t find specific design from I find TI and Cypress block diagram as below.



In my understanding, CCG2 integrates MCU and CC controller(MSP430+TUSB422), and CCG2 don’t need LDO as its wide vdd range. Is it correct?

Have you seen any more specific schematics/documents in this application?  

For TUSB544: I can see FLIP CTL0 CTL1 is controlled by PD controller(Or TUSB422+MSP430). My question is: what’s the three pins function in c-c active cable application? In my understanding, CC controller can configure TX/RX to USB3.1 or Alt mode.

  1. For example, when NB connects monitor through type C-C cable. Is there any change on the four TX/RX signal lane in PD alt mode negotiation? My understanding is NB and monitor switches lanes at their sides, and nothing happens in cable lanes. Is my understanding correct?  
  2. In c-c cable application, redriver EQ gain is settled by resistor divider. Will FLIP,CTL0,CTL1 control EQ gain when the cable design fix?   
  3. Can customer use TUSB544 without TUSB422 or MSP430 for EQ setting? Just like TUSB544EVM