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AM186EM-33VC/W Datasheet(PDF) 70 Page - Advanced Micro Devices |
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AM186EM-33VC/W Datasheet(HTML) 70 Page - Advanced Micro Devices |
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70 / 98 page  70 Am186/188EM and Am186/188EMLV Microcontrollers PRELIMINA R Y SWITCHING CHARACTERISTICS over Commercial operating range PSRAM Read Cycle (33 MHz and 40 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 Equal loading on referenced pins. b If either spec 2 or spec 59 is met with respect to data hold time, the part will function correctly. Preliminary Parameter 33 MHz 40 MHz No. Symbol Description Min Max Min Max Unit General Timing Requirements 1 tDVCL Data in Setup 8 5 ns 2 tCLDX Data in Hold(b) 3 2 ns General Timing Responses 5 tCLAV AD Address Valid Delay and BHE 0 15 0 12 ns 7 tCLDV Data Valid Delay 0 15 0 12 ns 8 tCHDX Status Hold Time 0 0 ns 9 tCHLH ALE Active Delay 15 12 ns 10 tLHLL ALE Width tCLCL–10= 20 tCLCL–5= 20 ns 11 tCHLL ALE Inactive Delay 15 12 ns 23 tLHAV ALE High to Address Valid 10 7.5 ns 80 tCLCLX LCS Inactive Delay 0 15 0 12 ns 81 tCLCSL LCS Active Delay 0 15 0 12 ns 84 tLRLL LCS Precharge Pulse Width tCLCL + tCLCH –3 tCLCL + tCLCH –1.25 ns Read Cycle Timing Responses 24 tAZRL AD Address Float to RD Active 0 0 ns 25 tCLRL RD Active Delay 0 15 0 10 ns 26 tRLRH RD Pulse Width 2tCLCL–15 =45 2tCLCL–10 =40 ns 27 tCLRH RD Inactive Delay 0 15 0 12 ns 28 tRHLH RD Inactive to ALE High(a) tCLCH–3 tCLCH–1.25 ns 59 tRHDX RD High to Data Hold on AD Bus(b) 0 0 ns 66 tAVRL A Address Valid to RD Low 2tCLCL–15 =45 2tCLCL–10 =40 ns 68 tCHAV CLKOUTA High to A Address Valid 0 15 0 10 ns |
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