tc9455f TOSHIBA Semiconductor CORPORATION, tc9455f Datasheet
tc9455f
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tc9455f Summary of contents
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... Microphone and echo levels are controlled by built-in volume controllers. They are controlled either by DC voltage or controlled in serial by the MCU. 2 TC9455F/N: Supports I C bus interface TC9488F/N: Supports three-lead interface · The system clock is generated by the CR oscillator circuit. · ...
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Block Diagram System Block Diagram TC9455,88F/N 2 2002-02-05 ...
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... POOUT Š SS Note 1: With the TC9455F and TC9488F, pins 4, 8, 12, 19, 24, and 27 are not connected (NC pins). NC pins are normally open. Function Digital supply voltage pin I Capacitor connecting pin for CR oscillator ( pF) I Resistor connecting pin for CR oscillator ( When VOLST = “H” level, CS signal input pin I When VOLST = “ ...
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... Operation 1. Oscillator circuit The TC9455F/N and TC9488F/N generate an internal system clock using the CR oscillator circuit. Connecting a capacitance ( and a resistance (R) of 5.6 kº sets the oscillator frequency to approx. 4 MHz and the sampling frequency to 32 kHz. Varying the external capacitance enables the oscillator frequency and sampling frequency for the system clock to be adjusted ...
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AD/DA converter and digital delay circuit 3. The AD/DA converter is a 12-bit successive comparison type. The sampling frequency when the system clock operates at 4 MHz is 32 kHz. The analog signal input from the AD converter is converted ...
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... The IC incorporates microphone input 1 (MIC1) and microphone input 2 (MIC2) volume and echo volume controllers. The built-in volume controller operates in 16 steps. Using an external variable resistor, volume can be controlled by the DC level or from the MCU using serial data. 2 The TC9455F/N supports bus interface; the TC9488F/N, a three-lead interface. 4.1 Serial control timing Figure 4 shows the serial control timing ...
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Setting of microphone and echo volumes Table 2 lists the microphone setting values and attenuation; Table 3 lists the echo volume setting values and attenuation. The DC level settings are typical values. Table 2 Microphone volume (VOL1, VOL2) attenuation ...
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Maximum Ratings (Ta = 25°C) Characteristics Supply voltage Input voltage Power dissipation Operating temperature Storage temperature Electrical Characteristics (unless otherwise specified 25° characteristics Characteristics Operating supply voltage Operating supply current Operating frequency Power-on reset voltage ...
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AC Characteristics Microphone amps and volumes Characteristics Symbol Microphone amp gain MICG MCO Output at ALC Operation Maximum Input at No ALC Operation Maximum Input 1 at ALC Operation Maximum Input 2 at ALC Operation POOUT output noise 1 POOUT ...
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... AC Characteristics Test Points 1. TC9488F/N three-lead interface 2 2. TC9455F bus interface 2 Purchase of TOSHIBA I C components conveys a license under the Phillips I 2 components system, provided that the system conforms to the I defined by Phillips. tIFS > 0.25 µs interface setup time tL > 0.25 µs shift clock L time tH > ...
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TC9455/88F AC Test Circuit TC9455,88F/N 11 2002-02-05 ...
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Package Dimensions Weight: 1.08 g (typ.) TC9455,88F/N 12 2002-02-05 ...
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Package Dimensions Weight: 1.2 g (typ.) TC9455,88F/N 13 2002-02-05 ...
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RESTRICTIONS ON PRODUCT USE · TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress ...