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ST40RA 数据表(PDF) 52 Page - STMicroelectronics |
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ST40RA 数据表(HTML) 52 Page - STMicroelectronics |
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52 / 94 page  ADCS 7260755H STMicroelectronics 52/94 ST40RA 7 Electrical specifications 7.5 LMI interface (DDR-SDRAM) AC specifications Figure 12: LMI DDR mode timings Symbol Parameter Min Max Units Note tLCHLCH LMI clock period 10 ns tLCHLCL LMI clock high time 0.45 tLCHLC H Table 27: LMI DDR-SDRAM AC timings tLCLLAV tLCHLCH tLCHLCL tLCLLCH tLCHDQS tLDWS tLDWH tDQSRH tDQSRS tDQSH tDQSL tLCHDQSR tDQSRH tDQSRS tDQSH tDQSL tLDWS tLDWH tLCHDWZ LCLKOUTA:B LMIADDR/COM NOTLCLKOUTA:B LMIDATAREAD DQSREAD LMIDATAWRITE DQSWRITE tLCHDQSR |
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