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AM188ES-40VC/W датащи(PDF) 71 Page - Advanced Micro Devices |
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AM188ES-40VC/W датащи(HTML) 71 Page - Advanced Micro Devices |
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71 / 102 page ![]() Am186/188ES and Am186/188ESLV Microcontrollers 71 P R E L IMINAR Y SWITCHING CHARACTERISTICS over COMMERCIAL operating ranges Write Cycle (20 MHz and 25 MHz) Notes: All timing parameters are measured at 1.5 V with 50 pF loading on CLKOUTA, unless otherwise noted. All output test conditions are with CL=50 pF. For switching tests, VIL=0.45 V and VIH =2.4 V, except at X1 where VIH =VCC – 0.5 V. a Testing is performed with equal loading on referenced pins. b This parameter applies to the DEN, DS, INTA1–INTA0, WR, WHB, and WLB signals. Parameter Preliminary Unit 20 MHz 25 MHz No. Symbol Description Min Max Min Max General Timing Responses 3tCHSV Status Active Delay 0 25 0 20 ns 4tCLSH Status Inactive Delay 0 25 0 20 ns 5tCLAV AD Address Valid Delay and BHE 0 25 0 20 ns 6tCLAX Address Hold 025020 ns 7tCLDV Data Valid Delay 0 15 0 20 ns 8tCHDX Status Hold Time 0 0 ns 9tCHLH ALE Active Delay 25 20 ns 10 tLHLL ALE Width tCLCL–10=40 tCLCL–10=30 ns 11 tCHLL ALE Inactive Delay 25 20 ns 12 tAVLL AD Address Valid to ALE Low(a) tCLCH –2 tCLCH–2 ns 13 tLLAX AD Address Hold from ALE Inactive(a) tCHCL–2 tCHCL–2 ns 14 tAVCH AD Address Valid to Clock High 0 0 ns 16 tCLCSV MCS/PCS Active Delay 0 25 0 20 ns 17 tCXCSX MCS/PCS Hold from Command Inactive(a) tCLCH–2 tCLCH–2 ns 18 tCHCSX MCS/PCS Inactive Delay 0 25 0 20 ns 19 tDXDL DEN Inactive to DT/R Low(a) 00 ns 20 tCVCTV Control Active Delay 1(b) 015020 ns 21 tCVDEX DS Inactive Delay 0 25 0 20 ns 22 tCHCTV Control Active Delay 2 0 25 0 20 ns 23 tLHAV ALE High to Address Valid 20 15 ns Write Cycle Timing Responses 30 tCLDOX Data Hold Time 0 0 ns 31 tCVCTX Control Inactive Delay(b) 025020 ns 32 tWLWH WR Pulse Width 2tCLCL–10=90 2tCLCL–10=70 ns 33 tWHLH WR Inactive to ALE High(a) tCLCH–2 tCLCH–2 ns 34 tWHDX Data Hold after WR(a) tCLCL–10=40 tCLCL–10=30 ns 35 tWHDEX WR Inactive to DEN Inactive(a) tCLCH–3 tCLCH–3 ns 41 tDSHLH DS Inactive to ALE High tCLCH–2= 21 tCLCH–2= 16 65 tAVWL A Address Valid to WR Low tCLCL+tCHCL–3 tCLCL+tCHCL–3 ns 67 tCHCSV CLKOUTA High to LCS/UCS Valid 0 25020 ns 68 tCHAV CLKOUTA High to A Address Valid 025020 ns 87 tAVBL A Address Valid to WHB, WLB Low tCHCL–3 25 tCHCL–3 20 ns 98 tDSHDIW DS High to Data Invalid—Write 35 0 30 ns |
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