TAS5727
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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
1
–
–
–
–
–
0
1
–
–
–
–
–
0
Mid-Z ramp disabled(1)
–
–
–
–
–
Mid-Z ramp enabled
–
–
–
–
–
Exit all-channel shutdown (normal operation)
Enter all-channel shutdown (hard mute)(1)
Reserved(1)
–
–
–
–
–
0
–
–
–
–
0
–
–
–
Ternary modulation disabled(1)
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
1
–
–
–
Ternary modulation enabled
Reserved(1)
–
0
–
–
–
–
0
–
A_SEL_FAULT configured as input
A_SEL_FAULT configured configured as output to function as A_SEL_FAULT pin.
Reserved(1)
–
–
1
–
–
–
–
0
(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
Soft unmute channel 3(1)
Soft mute channel 2
Soft unmute channel 2(1)
Soft mute channel 1
Soft unmute channel 1(1)
0
–
–
–
1
–
–
0
–
–
–
1
–
–
0
(1) Default values are in bold.
Copyright © 2010, Texas Instruments Incorporated
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