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IMX28AEC bảng dữ liệu(PDF) 52 Page - Freescale Semiconductor, Inc |
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IMX28AEC bảng dữ liệu(HTML) 52 Page - Freescale Semiconductor, Inc |
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52 / 72 page ![]() i.MX28 Applications Processors Data Sheet for Automotive Products, Rev. 1 52 Freescale Semiconductor 3.5.13 SPDIF AC Timing SPDIF data is sent using bi-phase marking code. When encoding, the SPDIF data signal is modulated by a clock that is twice the bit rate of the data signal. The following Table 57 shows SPDIF timing parameters, including the timing of the modulating Tx clock (spdif_clk) in SPDIF transmitter as shown in the Figure 35. Figure 35. spdif_clk Timing Table 56. SAIF Receiver Timing with Internal Clock ID Parameter Min. Max. Unit SS1 BITCLK period 81.4 — ns SS2 BITCLK high period 36.0 — ns SS3 BITCLK rise time — 6.0 ns SS4 BITCLK low period 36.0 — ns SS5 BITCLK fall time — 6.0 ns SS14 BITCLK high to LRCLK high — 15.0 ns SS15 BITCLK high to LRCLK low — 15.0 ns SS16 SDATA setup time before BITCLK high 10.0 — ns SS17 SDATA hold time after BITCLK high 0.0 — ns Table 57. SPDIF Timing Characteristics Symbol Timing Parameter Range Unit Min Max SPDIFOUT output (Load = 30pf) •Skew • Transition Rising • Transition Falling — — — — — — 1.5 13.6 18.0 ns Modulating Tx clock (spdif_clk) period spclkp 81.4 — ns spdif_clk high period spclkph 65.1 — ns spdif_clk low period spclkpl 65.1 — ns spdif_clk (Input) spclkp spclkph spclkpl |
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