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USB7016 Fiches technique(PDF) 35 Page - Microchip Technology |
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USB7016 Fiches technique(HTML) 35 Page - Microchip Technology |
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35 / 60 page ![]() 2022 Microchip Technology Inc. and its subsidiaries DS00003740B-page 35 USB7016 8.0 FUNCTIONAL DESCRIPTIONS This section details various USB7016 functions, including: • Downstream Battery Charging • Port Power Control • CC Pin Orientation and Detection • PortSplit • FlexConnect • USB to GPIO Bridging • USB to I2C Bridging • USB to SPI Bridging • Link Power Management (LPM) • Resets 8.1 Downstream Battery Charging The device can be configured by an OEM to have any of the downstream ports support battery charging. The hub’s role in battery charging is to provide acknowledgment to a device’s query as to whether the hub system supports USB battery charging. The hub silicon does not provide any current or power FETs or any additional circuitry to actually charge the device. Those components must be provided externally by the OEM. If the OEM provides an external supply capable of supplying current per the battery charging specification, the hub can be configured to indicate the presence of such a supply from the device. This indication, via the PRT_CTLx pins, is on a per port basis. For example, the OEM can configure two ports to support battery charging through high current power FETs and leave the other two ports as standard USB ports. The port control signals are assigned to programmable pins (PFx) and therefore the device must be programmed into specific configurations to enable the signals. Refer to Section 3.3.4, PF[31:3] Configuration (CFG_STRAP[2:1]) for addi- tional information. For detailed information on utilizing the battery charging feature, refer to the application note “AN2810 Configuration of USB7002/USB7006/USB7016/USB705x ”, which can be found on the Microchip USB7016 product page www.micro- chip.com/USB7016. FIGURE 8-1: BATTERY CHARGING EXTERNAL POWER SUPPLY SOC VBUS[n] PRT_CTLx INT SCL SDA Microchip Hub DC Power |
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