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WM8980CGEFL/V Datasheet(PDF) 83 Page - Wolfson Microelectronics plc |
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WM8980CGEFL/V Datasheet(HTML) 83 Page - Wolfson Microelectronics plc |
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83 / 123 page  Pre-Production WM8980 w PP, Rev 3.8, May 2012 83 u-law Companding 0 20 40 60 80 100 120 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Normalised Input 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Figure 49 u-Law Companding A-law Companding 0 20 40 60 80 100 120 0 0.2 0.4 0.6 0.8 1 Normalised Input 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Figure 50 A-Law Companding GENERAL PURPOSE INPUT/OUTPUT The WM8980 has three dual purpose input/output pins and one dedicated GPIO. CSB/GPIO1: CSB / GPIO pin L2/GPIO2: Left channel line input / headphone detection input R2/GPIO3: Right channel line input / headphone detection input GPIO4: Dedicated GPIO The GPIO2 and GPIO3 functions are provided for use as jack detection inputs. The GPIO1 and GPIO4 functions are provided for use as jack detection inputs or general purpose outputs. The default configuration for the CSB/GPIO1 and GPIO4 pins are to be inputs. |
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