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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8945ECS/R датащи(PDF) 71 Page - Wolfson Microelectronics plc |
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WM8945ECS/R датащи(HTML) 71 Page - Wolfson Microelectronics plc |
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71 / 169 page  Production Data WM8945 w PD, May 2011, Rev 4.1 71 8-bit mode (without Companding) may be enabled by setting DAC_COMPMODE=1 or ADC_COMPMODE=1, when DAC_COMP=0 and ADC_COMP=0. LOOPBACK A loopback function is provided for test and evaluation purposes. When the LOOPBACK register bit is set, the DAC input data is fed through the DSP Core to the ADC output, as illustrated in Figure 30. Figure 30 Audio Interface Loopback REGISTER ADDRESS BIT LABEL DEFAULT DESCRIPTION R5 (05h) Companding control 5 LOOPBACK 0 Digital Loopback Function 0 = No loopback 1 = Loopback enabled (DACDAT input is fed through the DSP Core to the ADCDAT output). Table 47 Loopback Control DIGITAL PULL-UP AND PULL-DOWN The WM8945 provides integrated pull-up and pull-down resistors on each of the DACDAT, LRCLK and BCLK pins. This provides a flexible capability for interfacing with other devices. Each of the pull- up and pull-down resistors can be configured independently using the register bits described in Table 48. |
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