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USB2524 Datasheet(PDF) 19 Page - Microchip Technology |
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USB2524 Datasheet(HTML) 19 Page - Microchip Technology |
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19 / 58 page  2013 - 2016 Microchip Technology Inc. DS00001588B-page 19 USB2524 7.1.4.4 Register 03h: Product ID (MSB) (Reset = 0x00) 7.1.4.5 Register 04h: Device ID (LSB) (Reset = 0x00) 7.1.4.6 Register 05h: Device ID (MSB) (Reset = 0x00) 7.1.4.7 Register 06h: CONFIG_BYTE_1 (Reset = 0x00) Bit Number Bit Name Description 7:0 PID_MSB Most Significant Byte of the Product ID. This is a 16-bit value that the Vendor can assign that uniquely identifies this particular product (assigned by OEM). This field is set by the OEM using either the SMBus or EEPROM interface options. Bit Number Bit Name Description 7:0 DID_LSB Least Significant Byte of the Device ID. This is a 16-bit device release number in BCD format (assigned by OEM). This field is set by the OEM using either the SMBus or EEPROM interface options. Bit Number Bit Name Description 7:0 DID_MSB Most Significant Byte of the Device ID. This is a 16-bit device release number in BCD format (assigned by OEM). This field is set by the OEM using either the SMBus or EEPROM interface options. Bit Number Bit Name Description 7 SELF_BUS_PWR Self or Bus Power: Selects between Self- and Bus-Powered operation. The Hub is either Self-Powered (draws less than 2mA of upstream bus power) or Bus-Powered (limited to a 100mA maximum of upstream power prior to being configured by the host controller). When configured as a Bus-Powered device, the Microchip Hub consumes less than 100mA of current prior to being configured. After configuration, the Bus- Powered Microchip Hub (along with all associated hub circuitry, any embedded devices if part of a compound device, and 100mA per externally available downstream port) must consume no more than 500mA of upstream VBUS current. The current consumption is system dependent, and the OEM must ensure that the USB 2.0 specifications are not violated. When configured as a Self-Powered device, <1mA of upstream VBUS current is consumed and all ports are available, with each port being capable of sourcing 500mA of current. This field is set by the OEM using either the SMBus or EEPROM interface options. Please see the description under Dynamic Power for the self/bus power functionality when dynamic power switching is enabled. 0 = Bus-Powered operation. 1 = Self-Powered operation. Note: If Dynamic Power Switching is enabled, this bit is ignored and the SELF_PWR pin is used to determine if the hub is operating from self or bus power. 6 Reserved Reserved, always = ‘0’. 5 HS_DISABLE High Speed Disable: Disables the capability to attach as either a High/Full- speed device, and forces attachment as Full-speed only i.e. (no High-Speed support). 0 = High-/Full-Speed. 1 = Full-Speed-Only (High-Speed disabled!) |
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