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CS4237B Datasheet(PDF) 62 Page - Cirrus Logic |
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CS4237B Datasheet(HTML) 62 Page - Cirrus Logic |
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62 / 114 page  E 2PROM Interface CTRLbase+1, Default = 10000000 D7 D6 D5 D4 D3 D2 D1 D0 ICH ISH ADC1 ADC0 IMH DIN/ EEN DOUT CLK CLK This bit is used to generate the clock for the Plug and Play E 2PROM. EEN must be set to 1 to make this bit operational. DOUT This bit is used to output serial data to the Plug and Play E 2PROM. EEN must be set to 1 to make this bit op- erational. DIN/EEN When read (DIN), this bit reflects the XD0 pin, which should be serial data output from the Plug and Play E 2PROM. EEN and DOUT must be 1 for this bit to function. When written (EEN), enables the E 2PROM interface: CLK and DOUT onto the peripheral port pins. Writing: 0 - E 2PROM interface disabled 1 - E 2PROM interface enabled IMH* Interrupt polarity - Modem. When set, the MINT pin is an active high sig- nal. When low, MINT is an active low signal. ADC1,0 These two bits are used to control an additional A/D mux and enable for an analog loopback path. These two mixing paths provide Karaoke support. These bits are provided for backwards compatibility. New soft- ware should use the MIC volume control in MODE 3 registers X2/X3 to support MIC mix to the output mixer. See Figure 6. 00 - Normal. A/D input from the input mux. 01 - Codec Input mux is mixed into output mixer. A/D input is from the input mux. This facilitates the Mic mixed to output, but only Mic recorded. 10 - Codec Input mux is mixed into output mixer. A/D input is from line outputs. This facilitates the Mic mixed to output, and the output recorded by the ADCs. 11 - reserved. ISH* Interrupt polarity - External Synthe- sizer. When set, the SINT pin is an active high signal. When low, SINT is an active low signal. ICH* Interrupt polarity - CDROM. When set, the CDINT pin is an active high sig- nal. When low, CDINT is an active low signal. * Note: These bits can be initialized through the Hardware Configuration data. Figure 6. MODE 2 Mixer Addition DS213PP4 CS4237B 62 |
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Similar Description - CS4237B |
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