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CMX608 数据表(PDF) 24 Page - CML Microcircuits |
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CMX608 数据表(HTML) 24 Page - CML Microcircuits |
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24 / 70 page ![]() RALCWI Vocoder CMX608/CMX618/CMX638 2014 CML Microsystems Plc 24 D/608_18_38/11 PCM3500 This CODEC should be supplied with a 4096MHz clock, giving a sample rate of 8ksample/s. The connections for this device are shown below and in Figure 15: PCM3500 CMX608/CMX618/CMX638 Pin Name Pin Name 1 Vcom Follow data sheet 2 Vref1 Follow data sheet 3 Vref2 Follow data sheet 4 Vin Follow data sheet 5 AGND Follow data sheet 6 M/S Pull high - Master mode 7 TSC Pull high - Time slot mode 8 BCK Connect to 17 SCLK 9 FS Connect to 18 STRB 10 DIN Connect to 16 SDO 11 DOUT Connect to 15 SDI 12 FSO Leave Unconnected 13 Vdd Follow data sheet 14 DGND Follow data sheet 15 SCKIO Follow data sheet 16 XTO Follow data sheet 17 XTI Follow data sheet 18 HPFD Follow data sheet 19 LOOP Follow data sheet 20 PDWN Connect to 20 REC 21 AGND Follow data sheet 22 Vout Follow data sheet 23 AGND Follow data sheet 24 Vcc Follow data sheet The PCM3500 is started using the following sequence of instructions: Select the external CODEC type - PCM3500. Write $45 (CODEC_PCM3500) into the EXCODECCONT register ($0B) and then wait for the RDY bit to be set in the STATUS register ($40). If C-BUS interrupts are enabled for the RDY bit, then IRQN will go low as well - this applies to the rest of the sequence. Ensure that the CODEC is in its power-save/reset mode, the CODEC port (SSP) is disabled and the CODEC command FIFO is empty. |
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