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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TLK105 датащи(PDF) 63 Page - Texas Instruments |
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TLK105 датащи(HTML) 63 Page - Texas Instruments |
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63 / 99 page  TLK105 TLK106 www.ti.com SLLSEB8A – AUGUST 2012 – REVISED MARCH 2013 Table 8-25. RMII Control and Status Register (RCSR), address 0x0017 (continued) BIT NAME DEFAULT DESCRIPTION 4 RMII Revision 0,RW RMII Revision Select: Select 1 = (RMII revision 1.0) CRS_DV will remain asserted until final data is transferred. CRS_DV will not toggle at the end of a packet. 0 = (RMII revision 1.2) CRS_DV will toggle at the end of a packet to indicate de- assertion of CRS. 3 RMII OVFL Status 0,COR RX FIFO Over Flow Status: 1 = Normal 0 = Overflow detected 2 RMII OVFL Status 0,COR RX FIFO Under Flow Status: 1 = Normal 0 = Underflow detected 1:0 ELAST_FUB <01>,RW Receive Elasticity Buffer Size: This field controls the Receive Elasticity Buffer which allows for frequency variation tolerance between the 50MHz RMII clock and the recovered data. The following values indicate the tolerance in bits for a single packet. The minimum setting allows for standard Ethernet frame sizes at ±50ppm accuracy for both RMII and Receive clocks. For greater frequency tolerance the packet lengths may be scaled (for ±100ppm, divide the packet lengths by 2). 00 = 14 bit tolerance (up to 16800 byte packets) 01 = 2 bit tolerance (up to 2400 byte packets) 10 = 6 bit tolerance (up to 7200 byte packets) 11 = 10 bit tolerance (up to 12000 byte packets) Copyright © 2012–2013, Texas Instruments Incorporated Register Block 63 Submit Documentation Feedback Product Folder Links: TLK105 TLK106 |
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