TAS5715
SLOS645 –AUGUST 2010
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SYSTEM CONTROL REGISTER 2 (0x05)
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
–
–
–
–
–
–
0
1
–
–
–
–
–
–
0
–
–
Reserved(1)
–
–
–
–
–
Exit all-channel shutdown (normal operation)(2)
Enter all-channel shutdown (hard mute)(1)
–
–
–
–
–
(1)
-
-
–
–
–
Reserved
1
–
–
–
–
Headphone Mode
0
–
–
–
–
Speaker Mode
Channel Volume in Headphone Mode = 0x08/0x09 (same as speaker channel volume
reg)
–
–
–
–
1
–
–
–
(1)
–
–
–
–
–
–
–
–
–
–
–
–
0
–
–
–
0
–
–
–
0
–
–
–
Channel VOlume in Headphone Mode = 0x0C (headphone volume reg)
(1)
Reserved
A_SEL/HP_SD configured as input
A_SEL/HP_SD configured configured as output to use as external HP amplifier
shutdown signal
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
1
–
–
–
0
1
Internal power stage FAULT signal is the source of A_SEL/HP_SD pin
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
–
FUNCTION
0
–
–
–
–
–
–
0
–
–
–
–
–
–
0
–
–
–
–
–
–
0
–
–
–
–
–
–
0
–
–
–
–
–
–
Reserved(1)
1
–
–
Soft mute channel 3
Soft unmute channel 3
Soft mute channel 2
Soft unmute channel 2
Soft mute channel 1
Soft unmute channel 1
0
–
–
–
1
–
–
0
–
–
–
1
–
–
0
(1) Default values are in bold.
54
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