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TAS5548 Datasheet(PDF) 36 Page - Texas Instruments |
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TAS5548 Datasheet(HTML) 36 Page - Texas Instruments |
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36 / 120 page  TAS5548 SLES270 – NOVEMBER 2012 www.ti.com Because RESET is an asynchronous signal, clicks and pops produced during the application (the leading edge) of RESET cannot be avoided. However, the transition from the hard-mute state (Non PWM Switching) to the operational state is performed using a quiet start-up sequence to minimize noise. This control uses the PWM reset and unmute sequence to shut down and start up the PWM. If a completely quiet reset or power-down sequence is desired, MUTE should be applied before applying RESET. The rising edge of the reset pulse begins device initialization before the transition to the operational mode. During device initialization, all controls are reset to their initial states. Table 5-2 shows the default control settings following a reset. Table 5-2. Values Set During Reset CONTROL SETTING Output mixer configuration 0xD0 bit 30 = 0 (remapped output mixer configuration) High pass Enabled Unmute from clock error Hard unmute Input automute Enabled Output automute Enabled Serial data interface format I2S, 24-bit Individual channel mute No channels are muted Automute delay 14.9 ms Automute threshold 1 < 8 bits Automute threshold 2 Same as automute threshold 1 Modulation limit 93.7% (Note: Some power stages require a lower modulation index) Six- or eight-channel configuration Eight channels Volume and mute update rate Volume ramp 42.6 ms Treble and bass slew rate Update every 1.31 ms Bank switching Manual bank selection is enabled Biquad coefficients Set to all pass Input mixer coefficients Input N → Channel N, no attenuation Output mixer coefficients Channel N → Output N, no attenuation Subwoofer sum into Ch1 and Ch2 Gain of 0 Ch1 and Ch2 sum in subwoofer Gain of 0 Bass and treble bypass/inline Bypass DRC bypass/inline Bypass DRC Default values Master volume Mute Individual channel volumes 0 dB All bass and treble indexes 0 dB Treble filter sets Filter set 3 Bass filter sets Filter set 3 Loudness Loudness disabled, default values AM interference mode enable Disabled AM interference mode IF 455 kHz AM interference mode select sequence 1 AM interference mode tuned frequency and 0000, BCD input mode 36 TAS5548 Controls and Status Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Links: TAS5548 |
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