TAS5504A Datasheet, PDF (83/97 Pages) Texas Instruments – 4-Channel Digital Audio PWM Processor

TAS5504A
www.ti.com
4-Channel Digital Audio PWM Processor
SLES169 – FEBRUARY 2006
6.23 4 × 2 Output Mixer Registers (0xAA and 0xAB)
The pass-through output mixer setting is:
• DAP channel 1 is mapped though the 8 × 2 crossbar mixer (0xAA) to PWM channel 1
• DAP channel 2 is mapped though the 8 × 2 crossbar mixer (0xAB) to PWM channel 2
Total data per register is 8 bytes.
Note that the pass-through output mixer configuration (0xD0 bit 30 = 1) is recommended. Using the
remapped output mixer configuration (0xD0 bit 30 = 0) increases the complexity of using some features
such as volume and mute. See TAS5504A Errata (SLEZ006).
Table 6-24. Output Mixer Control Register Format (Upper 4 Bytes)
D31 D30 D29 D28 D27 D26 D25 D24
FUNCTION
0
0
0
0
Select channel 1 to output mixer
0
0
0
1
Select channel 2 to output mixer
0
1
1
0
Select channel 3 to output mixer
0
1
1
1
Select channel 4 to output mixer
G27 G26 G25 G24 Selected channel gain (upper 4 bits)
D23 D22 D21 D20 D19 D18 D17 D16
FUNCTION
G23 G22 G21 G20 G19 G18 G17 G16 Selected channel gain (continued)
D15 D14 D13 D12 D11 D10 D9
G15 G14 G13 G12 G11 G10 G9
D8
FUNCTION
G8 Selected channel gain (continued)
D7 D6 D5 D4 D3 D2 D1 D0
FUNCTION
G7 G6 G5 G4 G3 G2 G1 G0 Selected channel gain (lower 8 bits)
Table 6-25. Output Mixer Control (Lower 4 Bytes)
D31 D30 D29 D28 D27 D26 D25 D24
FUNCTION
0
0
0
0
Select channel 1 to output mixer
0
0
0
1
Select channel 2 to output mixer
0
1
1
0
Select channel 3 to output mixer
0
1
1
1
Select channel 4 to output mixer
G27 G26 G25 G24 Selected channel gain (upper 4 bits)
D23 D22 D21 D20 D19 D18 D17 D16
FUNCTION
G23 G22 G21 G20 G19 G18 G17 G16 Selected channel gain (continued)
D15 D14 D13 D12 D11 D10 D9
G15 G14 G13 G12 G11 G10 G9
D8
FUNCTION
G8 Selected channel gain (continued)
D7 D6 D5 D4 D3 D2 D1 D0
FUNCTION
G7 G6 G5 G4 G3 G2 G1 G0 Selected channel gain (lower 8 bits)
Serial Control Interface Register Definitions
83