Datasheet

TAS5548
www.ti.com SLES270 –NOVEMBER 2012
11.4 System Control Register 2 (0x04)
Bit D3 is reserved.
Table 11-4. System Control Register-2 Format
D7 D6 D5 D4 D3 D2 D1 D0 Function
0 – – – – – – – Unmute Threshold 6 dB over Input Threshold
1 – – – – – – – Unmute Threshold equal to Input Threshold
– 0 – – – – – – All channel auto-mute timeout disable
– 1 – – – – – – All channel auto-mute timeout enable
– – 0 – – – – – Disable channel group
– – 1 – – – – – Enable channel group
– – – 0 – – – – Enable DAP automute
– – – 1 – – – – Disable DAP automute
– – – – 0 0 – – Normal Mode
– – – – – 1 – – Line out Mode
– – – – – – 1 – ASEL_EMO2 pin is input
– – – – – – 0 – ASEL_EMO2 pin is out output
– – – – – – – 0 No Output Downmix on SDOUT(TX SAP Disable)
– – – – – – – 1 Output Downmix on SDOUT. Dolby-out is enabled when this bit is
set and system is in normal mode
11.5 Channel Configuration Control Registers (0x05–0x0C)
Channels 1, 2, 3, 4, 5, 6, 7, and 8 are mapped into 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, and 0x0C,
respectively.
Table 11-5. Channel Configuration Control Register Format
D7 D6 D5 D4 D3 D2 D1 D0 FUNCTION
0 – – – – – – – Disable back-end reset sequence if all channels set to disable.
1 – – – – – – – Enable back-end reset sequence.
– 0 – – – – – – RESERVED
– 1 – – – – – – RESERVED
– – 0 – – – – – RESERVED
– – 1 – – – – – RESERVED
– – – 0 – – – – Normal Back-End Polarity
– – – 1 – – – – Switches PWM+ and PWM– and inverts audio signal
– – – – 0 – – – RESERVED
– – – – 1 – – – RESERVED
– – – – – 0 – – RESERVED
– – – – – 1 – – RESERVED
– – – – – – 0 – RESERVED
– – – – – – 1 – RESERVED
Copyright © 2012, Texas Instruments Incorporated Serial-Control Interface Register Definitions 77
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