TAS5715_10 Datasheet, PDF (54/74 Pages) Texas Instruments – 25-W DIGITAL AUDIO POWER AMPLIFIER WITH EQ AND DRC

TAS5715
SLOS645 – AUGUST 2010
SYSTEM CONTROL REGISTER 2 (0x05)
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When bit D6 is set low, the system exits all-channel shutdown and starts playing audio; otherwise, the outputs
are shut down (hard mute).
Table 9. System Control Register 2 (0x05)
D7 D6 D5 D4 D3 D2 D1 D0
FUNCTION
0–– – – –
–
– Reserved⁽¹⁾
–0– – – –
–
– Exit all-channel shutdown (normal operation)⁽²⁾
–1– – – –
–
– Enter all-channel shutdown (hard mute)⁽¹⁾
––0 -
-
–
–
– Reserved ⁽¹⁾
––– 1 – –
–
– Headphone Mode
––– 0 – –
–
– Speaker Mode
––– – 1 –
–
–
Channel Volume in Headphone Mode = 0x08/0x09 (same as speaker channel volume
reg)
––– – 0 –
–
– Channel VOlume in Headphone Mode = 0x0C (headphone volume reg) ⁽¹⁾
––– – – 0
–
– Reserved ⁽¹⁾
––– – – –
0
– A_SEL/HP_SD configured as input
––– – – –
1
–
A_SEL/HP_SD configured configured as output to use as external HP amplifier
shutdown signal
––– – – –
–
0 Internal power stage FAULT signal is the source of A_SEL/HP_SD pin
––– – – –
–
1
HPSDZ is the source of A_SEL/HP_SD pin (set this before switching to headphone
mode)
(1) Default values are in bold.
(2) When exiting all-channel shutdown, soft unmute is might not occur unless register 0x03, bit 5 is set to 1.
SOFT MUTE REGISTER (0x06)
Writing a 1 to any of the following bits sets the output of the respective channel to 50% duty cycle (soft mute).
Table 10. Soft Mute Register (0x06)
D7 D6 D5 D4 D3 D2 D1 D0
00000 –
–
– Reserved⁽¹⁾
––––– 1
–
– Soft mute channel 3
––––– 0
–
– Soft unmute channel 3
––––– –
1
– Soft mute channel 2
––––– –
0
– Soft unmute channel 2
––––– –
–
1 Soft mute channel 1
––––– –
–
0 Soft unmute channel 1
FUNCTION
(1) Default values are in bold.
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