iPod IWIP3G User Guide - Page 129
Set Control Micbias
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6.25 SET CONTROL MICBIAS SET CONTROL MICBIAS controls the linear regulator that drives current through the dedicated mic bias pin. 6.25.1 Syntax Synopsis: SET CONTROL MICBIAS [{voltage} {current}] Description: voltage current If no parameters are given, returns current mic bias settings. Voltage driven through the mic bias pin. Range 0-F (hex). Current driven through the mic bias pin. Range: 0-F (hex). The setting values and their corresponding typical voltage and current ranges are in the table below. Value 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Voltage (V) 1.61 - 1.80 1.65 - 1.86 1.71 - 1.93 1.76 - 1.98 1.84 - 2.06 1.89 - 2.14 1.97 - 2.23 2.04 - 2.32 2.18 - 2.46 2.27 - 2.58 2.39 - 2.72 2.50 - 2.87 2.70 - 3.09 2.85 - 3.29 3.07 - 3.56 3.28 - 3.84 Current (mA) 0.237 - 0.394 0.296 - 0.492 0.354 - 0.589 0.412 - 0.687 0.471 - 0.785 0.530 - 0.883 0.589 - 0.980 0.647 - 1.078 0.706 - 1.176 0.764 - 1.273 0.823 - 1.371 0.882 - 1.469 0.940 - 1.566 0.998 - 1.664 1.057 - 1.762 1.116 - 1.859 129