Anonymous
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Jun 26, 2008
06:14 AM
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Jun 26, 2008
06:14 AM
Hi,
I'm going to use CY7C65630 like a built-in USB2.0 HUB for set-top-box.
Question:
Sheme is powered from internaly power sourse.
What state will be pins PWR#[0-4], if VBUSPOWER is low after chip was in normal work mode.
It's posible, to control power all downstream ports by VBUSPOWER state changing?
I'm going to use CY7C65630 like a built-in USB2.0 HUB for set-top-box.
Question:
Sheme is powered from internaly power sourse.
What state will be pins PWR#[0-4], if VBUSPOWER is low after chip was in normal work mode.
It's posible, to control power all downstream ports by VBUSPOWER state changing?
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2 Replies
Anonymous
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Nov 21, 2013
12:15 PM
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Nov 21, 2013
12:15 PM
Hi
I assume that you are using the self powered hub. For self powered HUB, VBUS monitoring is required because, HUB shouldn't drive data lines when VBUS is not connected or receiving less voltage. So whenever the VBUS goes low, reset is asserted.
Regards,
Vikas.
Anonymous
Not applicable
Nov 25, 2013
12:00 PM
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Nov 25, 2013
12:00 PM
Hi,
Please explain your requirement in detail.
Controlling DSP power using VBUSPOWER is not a good idea. Pulling VBUSPOWER signal low will put the device into detached state.
-PRJI