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TDA7400 データシート(PDF) 23 Page - STMicroelectronics |
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TDA7400 データシート(HTML) 23 Page - STMicroelectronics |
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23 / 28 page ![]() Stereodecoder (subaddress 9H) MSB LSB FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0 1 STD Unmuted STD Muted 0 1 1 0 In Gain 8.5dB In Gain 6dB others combinations not used 1 must be ”1” 0 1 Forced Mono Mono/Stereo switch automatically 0 1 Noiseblanker PEAK charge current low Noiseblanker PEAK charge current high 0 1 Pilot Threshold HIGH Pilot Threshold LOW 0 1 Deemphasis 50 µs Deemphasis 75 µs Soft Mute and Bass Programming (subaddress 8H) MSB LSB FUNCTION D7 D6 D5 D4 D3 D2 D1 D0 0 1 0 0 1 1 0 1 0 1 0 1 Mute Enable Soft Mute Disable Soft Mute Mutetime = 0.48ms Mutetime = 0.96ms Mutetime = 40.4ms Mutetime = 324ms Stereodecoder Soft Mute Influence = on Stereodecoder Soft Mute Influence = off 0 0 1 1 1 0 1 0 1 1 Bass Center Frequency Center Frequency = 60 Hz Center Frequency = 70 Hz Center Frequency = 80 Hz Center Frequency = 100Hz Center Frequency = 150Hz (1) 0 0 1 1 0 1 0 1 Noise Blanker Time Center Frequency = 38 µs Center Frequency = 25.5 µs Center Frequency = 32 µs Center Frequency = 22 µs (1) Only for Bass Q-Factor = 2.0 TDA7400 23/28 |
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