Datasheet

TAS5715
SLOS645 –AUGUST 2010 www.ti.com
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 – – – – – – – 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
Channel Volume in Headphone Mode = 0x08/0x09 (same as speaker channel volume
– – – – 1 – – –
reg)
– – – – 0 – – – Channel VOlume in Headphone Mode = 0x0C (headphone volume reg)
(1)
– – – – – 0 – – Reserved
(1)
– – – – – – 0 – A_SEL/HP_SD configured as input
A_SEL/HP_SD configured configured as output to use as external HP amplifier
– – – – – – 1 –
shutdown signal
– – – – – – – 0 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
– – – – – – – 1
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
– – – – – 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
(1) Default values are in bold.
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