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AS3502 датащи(PDF) 28 Page - ams AG |
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AS3502 датащи(HTML) 28 Page - ams AG |
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28 / 29 page ![]() REV. M Page 28 September 1998 AS3502 Serial Control Interface Timing (-40°C<TA <+70°C, 3.0 V £VDD£4.5 V) # Parameter Symbol Condition Min. Typ.* Max. Units 1 Frequency of SCL fSCLK 128 2048 kHz 2 Width of SCL Low tWCH 160 ns 3 Width of SCL High tWCL 160 ns 4 Fall Time of SCL tFC 50 ns 5 Rise Time of SCL tRC 50 ns 6 Hold Time from SCL High to /CS Low tHCS For 1st SCL 10 ns 7 Hold Time from SCL High to /CS High tHSC For 8th SCL 100 ns 8 Set up Time from /CS Transition to SCL High tSSC 60 ns 9 Setup Time from /CS Transition to SCL Low tSSC0 SDO is not enabled for a single byte transfer 60 ns 10 Setup Time SDI Data In toSCL High tSDC 50 ns 11 Hold Time SCL High to SDI Invalid tHCD 50 ns 12 Delay Time SCL Low to SDO Data Out Valid tDCD 100pF + 2 LSTTL Loads 80 ns 13 Delay Time from /CS Low to SDO Valid tDSD Only valid for dual chip selects 80 ns 14 Delay Time from /CS Low to SDO High Impedance, whichever comes earlier tDDZ 15 80 ns 1 2 88 SCL CS SDI SDO 1 6 8 2 3 10 11 7 0 0 7 70 1 4 5 6 7 8 9 12 13 7 14 14 6 Serial Control Interface Timing Diagramme |
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