IC DGTL AUDIO PWM PROC 64-TQFP

TAS5508APAG

Manufacturer Part NumberTAS5508APAG
DescriptionIC DGTL AUDIO PWM PROC 64-TQFP
ManufacturerTexas Instruments
TypePWM Processor
TAS5508APAG datasheet
 


Specifications of TAS5508APAG

ApplicationsDVDMounting TypeSurface Mount
Package / Case64-TQFP, 64-VQFPFor Use WithTAS5342DDV6EVM - TAS5342DDV6EVMTAS5508-5142K7EVM - EVAL MODULE FOR TAS5508B/TAS5142TAS5508-5122C6EVM - EVAL MODULE FOR TAS5508B/TAS5122TAS5508-5121K8EVM - EVAL MODULE FOR TAS5508B/TAS5121
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names296-17475
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
Page 41
42
Page 42
43
Page 43
44
Page 44
45
Page 45
46
Page 46
47
Page 47
48
Page 48
49
Page 49
50
Page 50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
Page 49/105

Download datasheet (2Mb)Embed
PrevNext
www.ti.com
Table 3-7. Audio System Configuration (General Control Register 0xE0)
Audio System
6 channels or 5.1 not using PSVC
6 channels using PSVC
5.1 system using PSVC
8 channels or 7.1 not using PSVC (default)
8 channels using PSVC
7.1 system using PSVC
3.3.3.1 Using Line Outputs in 6-Channel Configurations
The audio system can be configured for a 6-channel configuration (with 2 lineouts) by writing a 1 to bit D1
of register 0xE0 (general control register). In this configuration, channel-5 and -6 processing are exactly
the same as the other channels, except that the master volume and the loudness function have no effect
on the signal.
Note that in 6-channel configuration, channels 5 and 6 are unaffected by back-end error (BKND_ERR
goes low).
To use channels 5 and 6 as unprocessed lineouts, the following setup is recommended:
Channel-5 volume and channel-6 volume should be set for a constant output such as 0 dB.
Bass and treble for channels 5 and 6 can be used if desired.
DRC1 should be bypassed for channels 5 and 6.
If a down mix is desired on channels 5 and 6 as lineout, the down mixing can be performed using the
channel-5 and channel-6 input mixers.
The operation of the channel-5 and -6 biquads is unaffected by the 6-/8-channel configuration setting.
3.3.4 Recovery from Clock Error
The TAS5508A can be set either to perform a volume ramp up during the recovery sequence of a clock
error or simply to come up in the last state (or desired state if a volume or tone update was in progress).
This feature is enabled via I
3.3.5 Power-Supply Volume-Control Enable
The power-supply volume control (PSVC) can be enabled and disabled via I
subwoofer PWM output can be configured to be controlled by the PSVC or digitally attenuated when
PSVC is enabled (for powered subwoofer configurations). Note that PSVC cannot be simultaneously
enabled along with unmute outputs after clock error feature.
3.3.6 Volume and Mute Update Rate
The TAS5508A has fixed soft volume and mute ramp durations. The ramps are linear. The soft volume
and mute ramp rates are adjustable by programming the I
steps to be 512, 1024, or 2048. The update is performed at a fixed rate regardless of the sample rate.
In normal speed, the update rate is 1 step every 4/f
In double speed, the update is 1 step every 8/f
In quad speed, the update is 1 step every 16/f
Because of processor loading, the update rate can increase for some increments by 1/f
the variance of the total time to go from 18 dB to mute is less than 25%.
NUMBER OF STEPS
512
Submit Documentation Feedback
8-Channel Digital Audio PWM Processor
D31–D4
0
0
0
0
0
0
2
C system control register 0x03.
2
C register 0xD0 for the appropriate number of
seconds.
S
seconds.
S
seconds.
S
Table 3-8. Volume Ramp Rates in ms
SAMPLE RATE (kHz)
44.1, 88.2, 176.4
46.44 ms
TAS5508A
SLES119A – FEBRUARY 2004 – REVISED JULY 2009
D3
D2
D1
D0
0
0
1
X
0
1
1
X
1
1
1
X
0
0
0
X
0
1
0
X
1
1
0
X
2
C register 0xE0. The
to 3/f
. However,
S
S
32, 48, 96, 192
42.67 ms
TAS5508A Controls and Status
49