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USB7252/KDX Arkusz danych(PDF) 38 Page - Microchip Technology

Numer części USB7252/KDX
Szczegółowy opis  4-Port USB 3.2 Gen 2 Type-C짰 Controller Hub
PDF  65 Pages
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Producent  MICROCHIP [Microchip Technology]
Strona internetowa  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB7252/KDX Arkusz danych(HTML) 38 Page - Microchip Technology

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USB7252
DS00002736D-page 38
2018 - 2020 Microchip Technology Inc.
8.0
FUNCTIONAL DESCRIPTIONS
This section details various USB7252 functions, including:
• Downstream Battery Charging
• Port Power Control
• CC Pin Orientation and Detection
• PortSplit
• FlexConnect
• Multi-Host Endpoint Reflector
• USB to GPIO Bridging
• USB to I2C Bridging
• USB to SPI Bridging
• USB to UART 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[31:2] Configuration (CFG_STRAP[2:1]) for addi-
tional information.
For detailed information on utilizing the battery charging feature, refer to the application note “USB Battery Charging
with Microchip USB7202 and USB725x Hubs”, which can be found on the Microchip USB7252 product page www.micro-
chip.com/USB7252.
FIGURE 8-1:
BATTERY CHARGING EXTERNAL POWER SUPPLY
SOC
VBUS[n]
INT
SCL
SDA
Microchip
Hub
DC Power



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