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TMS320DM647_0804 датащи(PDF) 107 Page - Texas Instruments |
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TMS320DM647_0804 датащи(HTML) 107 Page - Texas Instruments |
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107 / 182 page ![]() TMS320DM647/TMS320DM648 Digital Media Processor www.ti.com SPRS372B – MAY 2007 – REVISED APRIL 2008 Table 6-39. DQGATE Routing Specification NO. PARAMETER MIN TYP MAX UNIT 1 DQGATEL Length F(1) CKB0B1 2 DQGATEH Length F(2)(3) CKB2B3 3 Center to center DQGATE to any other trace spacing 4 w 4 DQS/DQ nominal trace length DQLM – 50 DQLM DQLM + Mils 50 5 DQGATEL Skew(4) 100 Mils 6 DQGATEH Skew(5)(3) 100 Mils (1) CKB0B1 is the sum of the length of the CK net plus the average length of the DQS0 and DQS1 nets. (2) CKB2B3 is the sum of the length of the CK net plus the average length of the DQS2 and DQS3 nets. (3) Only used on 32-bit-wide DDR2 memory systems. (4) Skew from CKB0B1 (5) Skew from CKB2B3 Submit Documentation Feedback Peripheral Information and Electrical Specifications 107 |
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