USB3503 datasheet(49/73 Pages) MICROCHIP

部品番号	USB3503

部品情報	USB 2.0 HSIC High-Speed Hub Controller Optimized

PDF	73 Pages

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メーカー	MICROCHIP [Microchip Technology]

ホームページ	http://www.microchip.com

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49 / 73 page

 2011-2015 Microchip Technology Inc.

DS00001584B-page 49

USB3503

Since the enumeration process for a hub sets the PORT_POWER feature for all downstream ports, this information can

be used to switch control over the PRTPWR setting between the battery charge logic and the hub logic.

• When the Hub PORT_POWER feature is ‘1’, the hub logic controls the PRTPWR setting.

• When the Hub PORT_POWER feature is ‘0’, the battery charging logic controls the PRTPWR setting.

No matter which controller is controlling the PRTPWR setting, an overcurrent event will always negate PRTPWR setting.

8.1.3

BATTERY CHARGING CONFIGURATION

Configuration of ports to support battery charging is done through serial port configuration load.

starting from Bit 1, enables Battery charging for each down stream port when asserted. Bit 1 represents port 1 and so

on. Each port with battery charging enabled asserts the corresponding PRTPWR register bit.

USB3503 データシート(PDF) 49 Page - Microchip Technology