TDA7718B datasheet(25/40 Pages) STMICROELECTRONICS

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TDA7718B

Description of the audioprocessor

4.11

Audioprocessor testing

In the test mode, which can be activated by setting bit D7 of the I2C subaddress byte and bit

D0 of the testing audioprocessor byte, several internal signals are available at the SE1L pin.

In this mode, the input resistance of 100 k

 is disconnected from the pin. Internal signals

available for testing are listed in the data-byte specification.

Figure 19. Application schematic

4.12

Application note

Above application schematic shows a proposal typical application that QD1 and FD/QD2 is

used as external signal sources. To limit the leakage current from signal source a 1 k



resistor is recommended to put between de-coupling capacitor and pin if the output

impedance of external signal source is less than 1 k

.

It's guaranteed that all input pins (pin 1~13) will not be broken even if 2Vrms input signal is

applied to the pins when CSP is power off.

TDA7718B 数据表(PDF) 25 Page - STMicroelectronics