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MC141556P bảng dữ liệu(PDF) 10 Page - Freescale Semiconductor, Inc |
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MC141556P bảng dữ liệu(HTML) 10 Page - Freescale Semiconductor, Inc |
10 / 18 page MC141556 10 MOTOROLA Table 5. Interface Descriptor Table 6. Endpoint Descriptor Table 7. Hub Descriptor Offset Field Size Value Description 0 bLength 1 09h No. of bytes in this descriptor = 9 1 bDescriptorType 1 04h Interface descriptor type 2 bInterfaceNumber 1 00h No. of Interface = 0 3 bAlternateSetting 1 00h Alternate setting value for the interface identified in the prior field = 0 4 bNumEndpoints 1 01h No. of endpoints used by this interface = 1 5 bInterfaceClass 1 09h Class code = 09 (assigned by USB) 6 bInterfaceSubClass 1 00h SubClass code = 01 (assigned by USB) 7 bInterfaceProtocol 1 00h Protocol code = 00 (assigned by USB) 8 iInterface 1 00h Index of string descriptor describing this interface = 0 Offset Field Size Value Description 0 bLength 1 07h No. of bytes in this descriptor = 7 1 bDescriptorType 1 05h Endpoint descriptor type 2 bEndpointAddress 1 81h Endpoint No. = 1, IN endpoint 3 bmAttributes 1 03h Endpoint attributes = b00000011, Transfer type = Interrupt 4 wMaxPacketSize 2 0001h Max. packet size this endpoint is capable of sending = 1 byte 6 bInterval 1 FFh Interval for polling endpoint for data transfer = 255 ms Offset Field Size Value Description 0 bLength 1 09h No. of bytes in this descriptor = 9 1 bDescriptorType 1 29h Hub descriptor type 2 bNbrPorts 1 04h/05h No. of downstream ports 3 wHubCharacteristics 2 0000h / 0004h/ 0009h/ 000Dh Hub’s characteristics Power Switching Mode: BIT1..BIT0 = 00: Ganged Power Switching BIT1..BIT0 = 01: Individual Port Power Switching Compound Device: BIT2=0: Not Compound Device BIT2=1: Compound Device Overcurrent Protection Mode: BIT4..BIT3=00: Global Overcurrent Protection BIT4..BIT3=01: Individual Port Overcurrent Protection 5 bPwrOn2PwrGood 1 32h Time from the power on to power good = 100 ms 6 bHubContrCurrent 1 64h Maximum current requirements of the Hub controller electronics 64h: 100 mA Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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