Datasheet

TAS5727
www.ti.com SLOS670 –NOVEMBER 2010
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 10. System Control Register 2 (0x05)
D7 D6 D5 D4 D3 D2 D1 D0 FUNCTION
0 – – – – – – – Mid-Z ramp disabled
(1)
1 – – – – – – – Mid-Z ramp enabled
– 0 – – – – – – Exit all-channel shutdown (normal operation)
– 1 – – – – – – Enter all-channel shutdown (hard mute)
(1)
– – 0 0 – – – – Reserved
(1)
0 – – – Ternary modulation disabled
(1)
– – – – 1 – – – Ternary modulation enabled
– – – – – 0 – – Reserved
(1)
– – – – – – 0 – A_SEL_FAULT configured as input
– – – – – – 1 – A_SEL_FAULT configured configured as output to function as A_SEL_FAULT pin.
– – – – – – – 0 Reserved
(1)
(1) Default values are in bold.
Ternary modulation is disabled by default. To enable ternary modulation, the following writes are required before
bringing the system out of shutdown:
1. Set bit D3 of register 0x05 to 1.
2. Write the following ICD settings:
(a) 0x11= 80
(b) 0x12= 7C
(c) 0x13= 80
(d) 0x24 =7C
3. Set the input mux register as follows:
(a) 0x20 = 00 89 77 72
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 11. 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)
– – – – – – 1 – Soft mute channel 2
– – – – – – 0 – Soft unmute channel 2
(1)
– – – – – – – 1 Soft mute channel 1
– – – – – – – 0 Soft unmute channel 1
(1)
(1) Default values are in bold.
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