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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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IMX35 датащи(PDF) 32 Page - Freescale Semiconductor, Inc |
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IMX35 датащи(HTML) 32 Page - Freescale Semiconductor, Inc |
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32 / 148 page  i.MX35 Applications Processors for Industrial and Consumer Products, Rev. 6 Freescale Semiconductor 32 Figure 10 depicts the setup and hold requirements of the trace data pins with respect to TRACECLK, and Table 28 lists the timing parameters. Figure 10. Trace Data Timing Diagram 4.9.4.1 Half-Rate Clocking Mode When half-rate clocking is used, the trace data signals are sampled by the TPA on both the rising and falling edges of TRACECLK, where TRACECLK is half the frequency of the clock shown in Figure 10. The same Ts and Th parameters from Table 28 still apply with respect to the falling edge of the TRACECLK signal. 4.9.5 EMI Electrical Specifications This section provides electrical parametrics and timing for the EMI module. 4.9.5.1 NAND Flash Controller Interface (NFC) The i.MX35 NFC supports normal timing mode, using two flash clock cycles for one access of RE and WE. AC timings are provided as multiplications of the clock cycle and fixed delay. Figure 11, Figure 12, Table 27. ETM TRACECLK Timing Parameters ID Parameter Min. Max. Unit Tcyc Clock period Frequency dependent — ns Twl Low pulse width 2 — ns Twh High pulse width 2 — ns Tr Clock and data rise time — 3 ns Tf Clock and data fall time — 3 ns Table 28. ETM Trace Data Timing Parameters ID Parameter Min. Max. Unit Ts Data setup 2 — ns Th Data hold 1 — ns |
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