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USB2422/MJ Datasheet(PDF) 19 Page - SMSC Corporation |
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USB2422/MJ Datasheet(HTML) 19 Page - SMSC Corporation |
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19 / 51 page  2-Port USB 2.0 Hi-Speed Hub Controller Datasheet SMSC USB2422 19 Revision 1.0 (06-04-13) DATASHEET 3.2 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 PRTPWR1/BC_EN1 pin configured (Port 1 only). See the following sections for details: Section 2.3: Pin Descriptions (Grouped by Function) on page 11 Section 2.5: Strap Pin Configuration on page 14 When the hub is initialized for configuration over SMBus. 3.2.1 Battery Charging Enabled via 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, and bit 2 represents port 2. Each port that has battery charging enabled asserts the corresponding PRTPWR[2:1] pin. |
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