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TDA7801SM データシート(PDF) 21 Page - STMicroelectronics |
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TDA7801SM データシート(HTML) 21 Page - STMicroelectronics |
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21 / 48 page  DocID022674 Rev 4 21/48 TDA7801 Operation mode 4 Operation mode The device has three main operation modes: Standby mode Tristate mode Amplifier mode 4.1 Standby mode When the ENABLE pin is low the device is in standby-mode. The current consumption is ISB. 4.2 Tristate mode When the ENABLE pin is high and the bit D7 of register DB0 is low the device is in tristate- mode. In that state the amplifier outputs are "high impedance", the I2C bus is ready to receive command. 4.3 Amplifier mode When the ENABLE pin is high and the bit D7 of register DB0 is high the device is in amplifier-mode ready to play. To move the device in that state it is enough to write '1' on bit D7 of register IB1 from tristate-mode. Note that the device starts with all channels muted by default (see I2C registers description, Section 9). |
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