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WM8580GEFV bảng dữ liệu(PDF) 43 Page - Wolfson Microelectronics plc |
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WM8580GEFV bảng dữ liệu(HTML) 43 Page - Wolfson Microelectronics plc |
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43 / 92 page ![]() Product Preview WM8580 w PP Rev 1.0 March 2006 43 SECONDARY AUDIO INTERFACES (SAIF RX & SAIF TX) The Transmit and Receive sides of the Secondary Audio Interface share a common LRCLK and a common BCLK. These can be supplied externally (slave mode) or they can be generated internally by the WM8580 (master mode). The master mode LRCLK/BCLK are created by the Master Mode Clock Gen module. The control of this module is described on page 21. The clock supplied to this module can be ADCMCLK, PLLACLK, PLLBCLK, or MCLK and is selected using the SAIFMS_CLKSEL register. If the digital routing has been configured such that the SAIF Transmitter is sourcing the S/PDIF Receiver, then PLLACLK is automatically selected, and it is recommended that the interface operate in master mode. However, if the SAIF Transmitter sources something other than the S/PDIF Receiver, and the S/PDIF Receiver is powered up, the PLLACLK and PLLBCLK are invalid for SAIF operation, so the choice is limited to ADCMCLK (default) or MCLK. REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R11 SAIF 1 0Bh 7:6 SAIFMS_ CLKSEL 11 SAIF Master Mode clock source 00 = ADCMCLK pin 01 = PLLACLK 10 = PLLBCLK 11 = MCLK pin Table 37 SAIF Master Mode Clock Control Figure 30 SAIF Clock Selection |
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