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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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IMX7DCEC датащи(PDF) 75 Page - NXP Semiconductors |
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IMX7DCEC датащи(HTML) 75 Page - NXP Semiconductors |
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75 / 161 page  Electrical characteristics i.MX 7Dual Family of Applications Processors Datasheet, Rev. 7, 09/2023 NXP Semiconductors 75 Figure 37. Read Data Latch cycle timing diagram (EDO mode) Table 56. Asynchronous mode timing parameters1 1 GPMI’s Asynchronous mode output timing can be controlled by the module’s internal registers HW_GPMI_TIMING0_ADDRESS_SETUP, HW_GPMI_TIMING0_DATA_SETUP, and HW_GPMI_TIMING0_DATA_HOLD. This AC timing depends on these registers settings. In the table, AS/DS/DH represents each of these settings. ID Parameter Symbol Timing T = GPMI Clock Cycle Unit Min. Max. NF1 NAND_CLE setup time tCLS (AS + DS) T - 0.12 [see notes2,3] 2 AS minimum value can be 0, while DS/DH minimum value is 1. 3 T = GPMI clock period -0.075ns (half of maximum p-p jitter). ns NF2 NAND_CLE hold time tCLH DH T - 0.72 [see note2] ns NF3 NAND_CE0_B setup time tCS (AS + DS + 1) T [see notes3,2] ns NF4 NAND_CE0_B hold time tCH (DH+1) T - 1 [see note2] ns NF5 NAND_WE_B pulse width tWP DS T [see note2] ns NF6 NAND_ALE setup time tALS (AS + DS) T - 0.49 [see notes3,2] ns NF7 NAND_ALE hold time tALH (DH T - 0.42 [see note2] ns NF8 Data setup time tDS DS T - 0.26 [see note2] ns NF9 Data hold time tDH DH T - 1.37 [see note2] ns NF10 Write cycle time tWC (DS + DH) T [see note2] ns NF11 NAND_WE_B hold time tWH DH T [see note2] ns NF12 Ready to NAND_RE_B low tRR4 4 NF12 is guaranteed by the design. (AS + 2) T [see 3,2] — ns NF13 NAND_RE_B pulse width tRP DS T [see note2] ns NF14 READ cycle time tRC (DS + DH) T [see note2] ns NF15 NAND_RE_B high hold time tREH DH T [see note2] ns NF16 Data setup on read tDSR — (DS T -0.67)/18.38 [see notes5,6] 5 Non-EDO mode. 6 EDO mode, GPMI clock 100 MHz (AS=DS=DH=1, GPMI_CTL1 [RDN_DELAY] = 8, GPMI_CTL1 [HALF_PERIOD] = 0). ns NF17 Data hold on read tDHR 0.82/11.83 [see notes5,6] — ns Data from NF NF14 NF15 NF17 NF16 NF12 NF13 NAND_DATAxx |
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