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STR910FAM32 数据表(PDF) 73 Page - STMicroelectronics |
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STR910FAM32 数据表(HTML) 73 Page - STMicroelectronics |
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73 / 99 page  STR91xFAx32 STR91xFAx42 STR91xFAx44 Electrical characteristics 73/99 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 31. 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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