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PCM3008 Datasheet(PDF) 9 Page - Texas Instruments |
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PCM3008 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 30 page PCM3008 SLAS332 – APRIL 2001 9 www.ti.com PCM audio interface Digital audio data is interfaced to the PCM3008 on LRCK (pin 10), BCK (pin 12), DIN (pin 9), and DOUT (pin 8). PCM3008 can accept 16-bit standard format, right-justified 16 bit for DAC and left-justified 16 bit for ADC. PCM3008 accepts 3 types of BCK and LRCK combination, with 64, 48 or 32 clocks of BCK in one clock of LRCK. The following figures illustrate audio data input/output format and timing. Ready 1 1024 1025 1 1024 1025 ZERO tRSTB 1024 SYSCK 1024 SYSCK After Ready After Ready Reset Reset Reset Release Reset Release tADCDLY1 tADCDLY1 tDACDLY1 tDACDLY1 tDACDLY1 VCOM (0.5 VDD) 2.1 V 0 V VCC SYSCK PDAD PDDA Internal Reset ADC DOUT DAC VO SYMBOL DEFINITION MIN TYP MAX UNIT tRSTB PDAD = LOW and PDDA = LOW pulse width 40 ns tADCDLY1 Initial delay time 2240/fs s tDACDLY1 Fade in, fade out time 2080/fs s Figure 3. Power-On Reset Timing LRCK BCK DIN MSB LSB MSB LSB BCK LRCK Right-Channel DOUT MSB LSB MSB LSB 16 1 2 3 14 15 16 1 2 3 14 15 16 14 15 16 12 3 14 15 16 12 3 1 DAC: 16-Bit, MSB-First, Right-Justified ADC: 16-Bit, MSB-First, Left-Justified Right-Channel Left-Channel Left-Channel Figure 4. Audio Data Input/Output Format |
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