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CS5535 датащи(PDF) 285 Page - National Semiconductor (TI) |
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CS5535 датащи(HTML) 285 Page - National Semiconductor (TI) |
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285 / 555 page ![]() Revision 0.8 285 www.national.com USB Register Descriptions (Continued) 5.5.4.13 Host Controller Current Done List Head ED (USBC_HcDoneHead) 5.5.4.14 Host Controller Frame Interval (USBC_HcFmInterval) USB Memory Offset 30h Type HCD: HC: RO R/W Reset Value 00000000h USBC_HcDoneHead Register Map 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 98 7654321 0 DoneHead RSVD USBC_HcDoneHead Bit Descriptions Bit Name HCD HC Description 31:4 DoneHead RO R/W Done Head. Pointer to the current Done List Head ED. 3:0 RSVD RO R/W Reserved. Read/write 0s. USB Memory Offset 34h Type HCD: HC: R/W RO Reset Value 00002EDFh USBC_HcFmInterval Register Map 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 98 7654321 0 FSLargestDataPacket RSVD FrameInterval USB_HcFmInterval Bit Descriptions Bit Name HCD HC Description 31 FrameInterval Toggle R/W RO Frame Interval Toggle This bit is toggled by HCD when it loads a new value into FrameInterval. 30:16 FSLargest DataPacket R/W RO FS Largest Data Packet. This field specifies a value that is loaded into the Largest Data Packet Counter at the beginning of each frame. 15:14 RSVD R/W RO Reserved. Read/write 0s. 13:0 FrameInterval R/W RO Frame Interval. This field specifies the length of a frame as (bit times - 1). For 12,000 bit times in a frame, a value of 11,999 is stored here. |
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