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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TDA7577BLVPD датащи(PDF) 26 Page - STMicroelectronics |
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TDA7577BLVPD датащи(HTML) 26 Page - STMicroelectronics |
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26 / 43 page  I2C mode and legacy mode selection TDA7577BLV 26/43 DocID025375 Rev 5 7 I2C mode and legacy mode selection It is possible to disable the I2C interface by acting on I2C EN pin and control the TDA7577BLV by means of the usual ST-BY and MUTE pins. In order to activate or deactivate this feature, I2C-EN must be set as follows: I2C-EN (PIN16) < 1.5 V: –I2C bus interface deactivated I2C-EN (PIN16) > 2.5 V: –I2C bus interface activated (It is also possible to let I2C-EN PIN floating to deactivate the I2C bus interface, or to short to VCC to activate I2C). In particular: When I2C is ENABLED: (I2C-EN pin > 2.5 V) then there are the following modes: STD MODE: Vstby (PIN5) > 2.6 V, IB2(D1)=0 HE MODE: Vstby (PIN5) > 2.6 V, IB2(D1)=1 PLAY MODE: Vmute (pin 4) > 2.6 V, IB1 (D2) = 1 The amplifier can always be switched off by putting Vstby to 0V, but with I2C enabled it can be turn on only through I2C (with Vstby > 2.6 V). When I2C is DISABLED: (I2C pin < 1.5 V) then there are the following modes: STD MODE: 2.6 V < ST-BY (PIN5) < 5 V HE MODE: Vstby (PIN5) > 7 V PLAY MODE: Vmute (pin 4) > 2.6 V For both STD and HE MODE the play/mute mode can be set acting on Vmute pin. In legacy mode (I2C disabled), faults (diagnostics information) are available on HW pin CD- Out. CD-Out pin is active on a low value [CD-Out low = fault detected]. The faults detected are: short to ground or VCC, short across the load. |
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