NXP Semiconductors TFA9812 Stereo Amplifier User Manual


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TFA9812_2 © NXP B.V. 2009. All rights reserved.
Preliminary data sheet Rev. 02 — 22 January 2009 15 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplifier with I
2
S input
Remark: Only MSB-first formats are supported.
48 f
s
LSB-justified 16-bit data yes no
48 f
s
LSB-justified 18-bit data yes no
48 f
s
LSB-justified 20-bit data yes no
48 f
s
LSB-justified 24-bit data yes yes
64 f
s
I
2
S up to 24-bit data yes yes
64 f
s
MSB-justified up to 24-bit data yes yes
64 f
s
LSB-justified 16-bit data yes no
64 f
s
LSB-justified 18-bit data yes no
64 f
s
LSB-justified 20-bit data yes no
64 f
s
LSB-justified 24-bit data yes no
Table 12. Supported digital audio data formats
BCK frequency Interface format (MSB first) Supported in I
2
C
control mode
Supported in Legacy
control mode
Fig 4. Serial interface input and output formats
16
MSB B2 B3 B4 B5 B6
LEFT
LSB-JUSTIFIED FORMAT 20 BITS
WS
BCK
DATA
RIGHT
1518 1720 19 2 1
B19
LSB
16
MSB B2 B3 B4 B5 B6
1518 1720 19 2 1
B19 LSB
MSB MSBB2
21123
LEFT
I
2
S-BUS FORMAT
WS
BCK
DATA
RIGHT
3
MSB B2
010aaa458
16
B5 B6 B7 B8 B9 B10
LEFT
LSB-JUSTIFIED FORMAT 24 BITS
WS
BCK
DATA
RIGHT
1518 1720 1922 212324 2 1
B3 B4
MSB
B2
B23
LSB
16
B5 B6 B7 B8 B9 B10
1518 1720 1922 212324 2 1
B3 B4
MSB
B2
B23 LSB
16
MSB
B2
LEFT
LSB-JUSTIFIED FORMAT 16 BITS
WS
BCK
DATA
RIGHT
15 2 1
B15
LSB
16
MSB B2
15 2 1
B15 LSB
16
MSB B2 B3 B4
LEFT
LSB-JUSTIFIED FORMAT 18 BITS
WS
BCK
DATA
RIGHT
1518 17 2 1
MSB B2 B3 B4
B17
LSB
16 1518 17 2 1
B17 LSB
MSB-JUSTIFIED FORMAT
WS
LEFT
RIGHT
321321
MSB B2 MSBLSB LSB MSB B2B2
BCK
DATA
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