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TAS5548DCAR Datasheet(PDF) 46 Page - Texas Instruments |
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TAS5548DCAR Datasheet(HTML) 46 Page - Texas Instruments |
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46 / 116 page  TAS5548 SLES270A – NOVEMBER 2012 – REVISED APRIL 2015 www.ti.com 7.4.21 Device Configuration Controls The TAS5548 provides a number of system configuration controls that can be set at initialization and set following a reset. • Channel configuration • Headphone configuration • Audio system configurations • Recovery from clock error • Power-supply volume-control enable • Volume and mute update rate • Modulation index limit • Master-clock and data-rate controls • Bank controls 7.4.21.1 Channel Configuration These registers control the TAS5548 response to back end errors. Table 12. Description of the Channel Configuration Registers (0x05 to 0x0C) BIT DESCRIPTION D7 Enable/disable error recovery sequence. In case the BKND_ERR pin is pulled low, this register determines if this channel is to follow the error recovery sequence or to continue with no interruption. D6 Reserved D5 Reserved D4 Inverts the PWM output. Inverting the PWM output can be an advantage if the power stage input pin is opposite the TAS5548 PWM pinout. This makes routing on the PCB easier. To keep the phase of the output, the speaker terminals must also be inverted. D3 Reserved D2 Reserved D1 Reserved D0 Reserved 7.4.21.2 Headphone Configuration Registers The headphone configuration controls are identical to the speaker configuration controls. The headphone configuration control settings are used in place of the speaker configuration control settings for channels 1 and 2 when the headphones are selected. However, only one configuration setting for headphones is used, and it is the default setting, that is, in headphone mode 0x05 and 0x06 settings are fixed in default. 7.4.21.3 Audio System Configurations The TAS5548 can be configured to comply with various audio systems: 5.1-channel system, 6-channel system, 7.1-channel system, and 8-channel system. The audio system configuration is set in the general control register (0xE0). Bits D31–D4 must be zero and D0 is do not care. D3 Must always be 0 (default). Note that subwoofer cannot be used as lineout when PSVC is enabled. (D3 is a write-only bit) D2 Enables/disables power-supply volume control D1 Sets number of speakers in the system, including possible line outputs D3–D1 must be configured for the audio system in the application, as shown in Table 13. 46 Submit Documentation Feedback Copyright © 2012–2015, Texas Instruments Incorporated Product Folder Links: TAS5548 |
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