Read Panasonic BB-HCM705CE Service Manual online
15
BB-HCM705CE
4.4.
Audio Block
PCM Codec and Video Amplifier (IC401)
Power Supply Voltage: 3.3V
Clock Frequency: Contains a built-in PLL function and generates a clock from the 2MCLK supplied from IC101.
I/F with Host: Controlled by I2C.
Audio Block: Contains an amplifier, LPF, gain adjustment, AD/DA converter, PCM serial I/F and speaker output function.
Power Supply Voltage: 3.3V
Clock Frequency: Contains a built-in PLL function and generates a clock from the 2MCLK supplied from IC101.
I/F with Host: Controlled by I2C.
Audio Block: Contains an amplifier, LPF, gain adjustment, AD/DA converter, PCM serial I/F and speaker output function.
Flow of audio Signal
[Microphone audio]
The audio signal input from the built-in microphone (MIC701) is amplified by the amplifier in the PCM Codec (IC401), with AD
conversion and gain adjustment performed.
The sampling frequency of the AD conversion is 8kHz and it is converted to the PCM in the format of 8bit and
[Microphone audio]
The audio signal input from the built-in microphone (MIC701) is amplified by the amplifier in the PCM Codec (IC401), with AD
conversion and gain adjustment performed.
The sampling frequency of the AD conversion is 8kHz and it is converted to the PCM in the format of 8bit and
µ law. Then,
64kbps data are output to the IC101 on the CPU board through the Serial I/F.
The data transfer of the Serial I/F is BCLK (256 kHz).
The data transfer of the Serial I/F is BCLK (256 kHz).
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