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USB2502-HT 数据表(PDF) 23 Page - Microchip Technology |
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USB2502-HT 数据表(HTML) 23 Page - Microchip Technology |
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23 / 40 page  2007 - 2016 Microchip Technology Inc. DS000002248A-page 23 USB2502 5.3.9.10 Register 09h: Non-Removable Device (Reset = 0x00) 5.3.9.11 Register 0Ah: Port Disable For Self Powered Operation (Reset = 0x00) 5.3.9.12 Register 0Bh: Port Disable For Bus Powered Operation (Reset = 0x00) 5.3.9.13 Register 0Ch: Max Power For Self Powered Operation (Reset = 0x00) 5.3.9.14 Register 0Dh: Max Power For Bus Powered Operation (Reset = 0x00) Bit Number Bit Name Description 7:0 NR_DEVICE Non-Removable Device: Indicates which port(s) include non-removable devic- es. ‘0’ = port is removable, ‘1’ = port is non-removable. Bit 7:3: Reserved, always = ‘0’ Bit 2= 1; Port 2 non-removable. Bit 1= 1; Port 1 non removable. Bit 0 is Reserved, always = ‘0’. Bit Number Bit Name Description 7:0 PORT_DIS_SP Port Disable Self-Powered: Disables 1 or more contiguous ports. ‘0’ = port is available, ‘1’ = port is disabled. Bit 7:3= 0; Reserved Bit 2= 1; Port 2 is disabled. Bit 1= 1; Port 1 is disabled. Bit 0 is Reserved, always = ‘0’ Bit Number Bit Name Description 7:0 PORT_DIS_BP Port Disable Bus-Powered: Disables 1 or more contiguous ports. ‘0’ = port is available, ‘1’ = port is disabled. Bit 7:3= 0; Reserved Bit 2= 1; Port 2 is disabled. Bit 1= 1; Port 1 is disabled. Bit 0 is Reserved, always = ‘0’ Bit Number Bit Name Description 7:0 MAX_PWR_SP Max Power Self_Powered: 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 USB 2.0 Specification does not permit this value to exceed 100mA A value of 50 (decimal) indicates 100mA. Bit Number Bit Name Description 7:0 MAX_PWR_BP Max Power Bus_Powered: Value in 2mA increments that the Hub consumes from an upstream port (VBUS) when operating as a bus-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. A value of 50 (decimal) indicates 100mA. |
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