AM335x USB endpoint

Nomo

Hello,

How many number of endpoint can be connected to the AM335x's USB ports?
Can each USB ports be following 127 devices (including hub)?

Best Regards,

Nomoto

over 10 years ago

0 Biser Gatchev-XID over 10 years ago

TI__Guru**** 393215 points

Hi,

This question is already answered in this thread: https://e2e.ti.com/support/arm/sitara_arm/f/791/t/254159

0 Bin Liu over 10 years ago in reply to Biser Gatchev-XID

TI__Guru**** 175301 points

Besides the information in the thread Biser referred. The number of connected devices also depends on the endpoint type the devices use.

If the devices only use Bulk or Control transfers, MUSB can support up to 126 devices;
But if the devices use Interrupt or Isoch transfers, for example , hub, mouse, keyboard, and some usb-uart devices, the number will be limmited by the MUSB 15 IN/OUT endpoints, because the endpoint dynamic allocation is not supported for Interrupt and Isoch transfers.

0 Daisuke Maeda over 8 years ago in reply to Bin Liu

Guru 20345 points

Hi,

Can USB mass storage class support up to 126 devices?

Eric shows USB mass storage example, to implement a USB bulk endpoint: e2e.ti.com/.../525450

Our customer wants to connect more endpoint devices to AM335x as the host and requires an example to implement.

Best regards,

Daisuke

0 Daisuke Maeda over 8 years ago in reply to Bin Liu

Guru 20345 points

Hi,

Is there any other information to support up to 126 devices with the dynamic allocation of endpoints?

Best regards,

Daisuke

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AM335x USB endpoint