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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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STR91XFAX44 데이터시트(PDF) 75 Page - STMicroelectronics |
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STR91XFAX44 데이터시트(HTML) 75 Page - STMicroelectronics |
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75 / 101 page  STR91xFAx3x, STR91xFAx4x Electrical characteristics 75/101 7.11 External memory bus timings VDDQ = 2.7 - 3.6V, VDD = 1.65 - 2V, TA = -40 / 85 °C, CL= 30 pF unless otherwise specified. 7.11.1 Asynchronous mode Non Mux Write Figure 17. Non-mux write timings Table 32. EMI bus clock period Symbol Parameter(1) 1. The internal EMI Bus clock signal is available externally only on LFBGA144 packages (ball M8), and not available on LQFP packages. Value (2) 2. EMI_ratio =1/ 2 by default (can be programmed to be 1 by setting the proper bits in the SCU_CLKCNTR register) tBCLK EMI Bus Clock period 1 /(fHCLK x EMI_ratio) tWCR tWP Address Data tWAS tWDS EMI_CSxn EMI_A[15:0] EMI_D[7:0] EMI_BWR_WRLn |
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