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SPEAR1340 датащи(PDF) 170 Page - STMicroelectronics |
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SPEAR1340 датащи(HTML) 170 Page - STMicroelectronics |
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170 / 200 page ![]() Timing characteristics SPEAr1340 170/200 Doc ID 023063 Rev 4 5.10 I2S timing characteristics This section describes the timing characteristics for the two I2S digital audio ports (I2S_IN and I2S_OUT). The timing characterization is performed assuming an input transition of 2 ns on all the inputs, an output load capacitance of 10 pF on all outputs and using PLL1 as source of I2S OUT_BITCLK with a nominal period of 40 ns. I2S transmit timing characteristics Figure 32. I2S transmit timing waveform Table 82. I2S transmit timing characteristics Symbol Description Min Max Unit TCLK I2S_OUT_BITCLK clock period 40 – ns TCLKhigh I2S_OUT_BITCLK pulse high 15 – ns TCLKlow I2S_OUT_BITCLK pulse low 15 – ns fOVRCLK I2S_OUT_OVERSAMP_CLK frequency fI2S_OUT_BITCLK/2 TOVRCLKhigh I2S_OUT_OVERSAMP_CLK pulse high 7.5 – ns TOVRCLKCLKlo w I2S_OUT_OVERSAMP_CLK pulse low 7.5 – ns TD I2S_OUT_BITCLK to I2S_OUT data delay 13 30 ns I2S_OUT_BITCLK I2S_OUT_DATA3 – I2S_OUT_DATA0, I2S_OUT_WS TCLKhigh TCLKlow TD I2S_OUT_OVRSAMP_CLK |
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