LED behavior definition and control method of CY7C65632/42

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ChHu_4370401
Level 1
Level 1

Hi,

I'd like to use CY7C65632/42 for the project.

I see there's LED control pins on CY7C65632/42 series

But I'm wondering -

1. What is the default control behaviour for GREEN/AMBER?

2. Can you control the LED behaviour?

3. How can you control, by pre-programmed into EEPROM? Or is it either one situation, once either choose EEPROM or LED function?

It's because we want to have LED indicator shows USB data transfer,

and I see there are LED control pins but I don't understand the description fully nor the exact LED control behaviour.

Could you kindly help to elaborate a bit more in detail?

Thanks,

Bertram

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1 Solution
NoriTan
Employee
Employee
25 sign-ins 5 questions asked 10 sign-ins

The port indicator behavior is specified by the USB specification as follows.

GS004370.png

This table comes from the "Chapter 11 Hub Specification" of the "Universal Serial Bus Specification Revision 2.0" document.

Regards,

Noriaki

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2 Replies
NoriTan
Employee
Employee
25 sign-ins 5 questions asked 10 sign-ins

The port indicator behavior is specified by the USB specification as follows.

GS004370.png

This table comes from the "Chapter 11 Hub Specification" of the "Universal Serial Bus Specification Revision 2.0" document.

Regards,

Noriaki

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Sananya_14
Moderator
Moderator
Moderator
750 replies posted 500 replies posted 250 solutions authored

Hi Bertram,

The AMBER and GREEN pins of the hub if 48-QFN package are present for either driving LEDs as Port indicators or Pin-strapping for configuration. They are by default active HIGH.

You could program the EEPROM with your custom descriptors or use Pin-strap configuration before enumeration.

Best Regards,

Sananya

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