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MC141556 bảng dữ liệu(PDF) 11 Page - Freescale Semiconductor, Inc |
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MC141556 bảng dữ liệu(HTML) 11 Page - Freescale Semiconductor, Inc |
11 / 18 page MC141556 11 MOTOROLA STATUS CHANGE REGISTER The additional endpoint 1 of the Hub Controller supports interrupt transfer which reports the Hub and Port Status Change Register, as shown in following table. This register contains only one byte. Table 8. Status Change Register REQUEST The Hub Controller will respond to the HOST Request through the endpoint 0 pipe in the way as illustrated in following tables. If the Hub responses with STALL packet, it means the request is not supported. 7 DeviceRemovable 1 00h/20h 00h: Indicate all the ports connected to this Hub are removable. 02h: Indicate Port5 is dedicated to internal use and permanent attached. 8 PortPwrCtrlMask 1 3Eh/ 1Eh/ 00h Indicates all the ports connected to this Hub are not affected by a Ganged-mode power request, Ports always require SetPortFeature (PORT_POWER) to control the port’s power state. 3Eh: 5 downstream ports are individual-controlled 1Eh: 4 downstream ports are individual-controlled 00h: all downstream ports are ganged-controlled Bit Function Value Description 0 Hub status change 0 1 No status change in Hub Hub status change detected 1 Port 1 status change 0 1 No status change in Port 1 Port 1 status change detected 2 Port 2 status change 0 1 No status change in Port 2 Port 2 status change detected 3 Port 3 status change 0 1 No status change in Port 3 Port 3 status change detected 4 Port 4 status change 0 1 No status change in Port 4 Port 4 status change detected 5 Port 5 status change 0 1 No status change in Port 5 Port 5 status change detected 6-7 Reserved 00 Default values Offset Field Size Value Description Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
Số phần tương tự - MC141556 |
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Mô tả tương tự - MC141556 |
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