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USB2422 数据表(PDF) 28 Page - Microchip Technology |
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USB2422 数据表(HTML) 28 Page - Microchip Technology |
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28 / 47 page  USB2422 DS00001726B-page 28 2013 - 2015 Microchip Technology Inc. 4.4.13 MAX POWER FOR SELF-POWERED OPERATION REGISTER (MAXPS) 4.4.14 MAX POWER FOR BUS-POWERED OPERATION REGISTER (MAXPB) 4.4.15 HUB CONTROLLER MAX CURRENT FOR SELF-POWERED OPERATION REGISTER (HCMCS) Address: 0Ch Size: 8 bits Bits Description Type Default 7:0 Max Power Self-Powered (MAX_PWR_SP) Value in 2mA increments that the Hub consumes from an upstream port (VBUS) when operating as a self-powered hub. This value includes the hub silicon along with the combined power consumption (from VBUS) of all associated circuitry on the board. This value also includes the power consumption of a permanently attached peripheral if the hub is configured as a compound device, and the embedded peripheral reports 0mA in its descriptors. Note: The USB2.0 Specification does not permit this value to exceed 100mA. R/W 00h Address: 0Dh Size: 8 bits Bits Description Type Default 7:0 Max Power Bus-Powered (MAX_PWR_BP) Value in 2mA increments that the Hub consumes from an upstream port (VBUS) when operating as a self-powered hub. This value includes the hub silicon along with the combined power consumption (from VBUS) of all associated circuitry on the board. This value also includes the power consumption of a permanently attached peripheral if the hub is configured as a compound device, and the embedded peripheral reports 0mA in its descriptors. R/W 00h Address: 0Eh Size: 8 bits Bits Description Type Default 7:0 Hub Controller Max Current Self-Powered (HC_MAX_C_SP) Value in 2mA increments that the Hub consumes from an upstream port (VBUS) when operating as a self- powered hub. This value includes the hub silicon along with the combined power consumption (from VBUS) of all associated circuitry on the board. This value does NOT include the power consumption of a permanently attached peripheral if the hub is configured as a compound device. Note: The USB2.0 Specification does not permit this value to exceed 100mA. R/W 00h |
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