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query on TUSB2046B hubs

natesh bhardwaj
Prodigy 70 points
Other Parts Discussed in Thread: TUSB2046B, TUSB2077A

1.Our requirement is for 32 ports using TUSB2046B hubs........so can WE connect this hub in the fashion i have pictured in the block diagram which i have attached with this post.

5554.HUB CASCADE.pptx 

2.While using TUSB2077A if we make the EXTMEM pin high then there is no requirement of external EEPROM according to the datasheet, then is it possible to cascade two hubs in which the EXTMEM pin is disabled.

  • 0
    TI__Genius 16430 points

    Natesh,

    First the question of cascading hubs has been asked and answered in multiple other forum posts from you - please try and consolidate your questions into one post for easier responses and a cleaner forum.

    As far as the EXTMEM pin, there is no more need for an EEPROM when cascading versus non-cascaded.  The EEPROM is only used for changing VID/PID/Strings which are not needed if you are OK with them being identified as GENERIC USB HUB in device manager.