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 I2S input

Remark: Only MSB-first formats are supported.

48 fsLSB-justified 16-bit data yes no

48 fsLSB-justified 18-bit data yes no

48 fsLSB-justified 20-bit data yes no

48 fsLSB-justified 24-bit data yes yes

64 fsI2S up to 24-bit data yes yes

64 fsMSB-justified up to 24-bit data yes yes

64 fsLSB-justified 16-bit data yes no

64 fsLSB-justified 18-bit data yes no

64 fsLSB-justified 20-bit data yes no

64 fsLSB-justified 24-bit data yes no

Table 12. Supported digital audio data formats

BCK frequency Interface format (MSB first) Supported in I2C

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
2112 3
LEFT
I2S-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