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USB251 Fiches technique(PDF) 18 Page - Microchip Technology

No de pièce USB251
Description  USB 2.0 Hi-Speed Hub Controller
PDF  57 Pages
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Fabricant  MICROCHIP [Microchip Technology]
Site Internet  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB251 Fiches technique(HTML) 18 Page - Microchip Technology

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USB251xB/xBi
DS00001692C-page 18
 2010 - 2015 Microchip Technology Inc.
4.2
Battery Charging Configuration
The battery charging option can be configured in one of two ways:
• When the hub is brought up in the default configuration with strapping options enabled, with the PRT-
PWR[x:1]/BC_EN[x:1] pins configured. See the following sections for details:
- Section 3.3, "Pin Descriptions (Grouped by Function)," on page 12
- Section 3.3.1.2, "Internal Pull-Down (IPD)," on page 15
• When the hub is initialized for configuration over I2C EEPROM or SMBus. Either of these interfaces can be used
to configure the battery charging option.
4.2.1
BATTERY CHARGING ENABLED VIA I2C EEPROM OR SMBUS
Register memory map location 0xD0 is allocated for battery charging support. The Battery Charging register at location
0xD0 starting from bit 1 enables battery charging for each downstream port when asserted. Bit 1 represents port 1, bit
2 represents port 2, etc. Each port with battery charging enabled asserts the corresponding PRTPWR[x:1] pin.



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