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STM32F207VC 数据表(PDF) 135 Page - STMicroelectronics |
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STM32F207VC 数据表(HTML) 135 Page - STMicroelectronics |
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135 / 178 page ![]() DocID15818 Rev 11 135/178 STM32F20xxx Electrical characteristics 177 Synchronous waveforms and timings Figure 60 through Figure 63 represent synchronous waveforms and Table 77 through Table 79 provide the corresponding timings. The results shown in these tables are obtained with the following FSMC configuration: • BurstAccessMode = FSMC_BurstAccessMode_Enable; • MemoryType = FSMC_MemoryType_CRAM; • WriteBurst = FSMC_WriteBurst_Enable; • CLKDivision = 1; (0 is not supported, see the STM32F20xxx/21xxx reference manual) • DataLatency = 1 for NOR Flash; DataLatency = 0 for PSRAM In all timing tables, the THCLK is the HCLK clock period. Figure 60. Synchronous multiplexed NOR/PSRAM read timings FSMC_CLK FSMC_NEx FSMC_NADV FSMC_A[25:16] FSMC_NOE FSMC_AD[15:0] AD[15:0] D1 D2 FSMC_NWAIT (WAITCFG = 1b, WAITPOL + 0b) FSMC_NWAIT (WAITCFG = 0b, WAITPOL + 0b) tw(CLK) tw(CLK) Data latency = 0 BUSTURN = 0 td(CLKL-NExL) td(CLKL-NExH) td(CLKL-NADVL) td(CLKL-AV) td(CLKL-NADVH) td(CLKL-AIV) td(CLKH-NOEL) td(CLKL-NOEH) td(CLKL-ADV) td(CLKL-ADIV) tsu(ADV-CLKH) th(CLKH-ADV) tsu(ADV-CLKH) th(CLKH-ADV) tsu(NWAITV-CLKH) th(CLKH-NWAITV) tsu(NWAITV-CLKH) th(CLKH-NWAITV) tsu(NWAITV-CLKH) th(CLKH-NWAITV) ai14893h |
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