BD5446EFV 查看數據表（PDF） - ROHM Semiconductor

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BD5446EFV

Class-D Speaker Amplifier or Digital Input

ROHM Semiconductor 

BD5446EFV

Technical Note

●I2S data format

LRCLK

BCLK

SDATA1

(SDATA2)

1/64fs

Lch

Rch

MSB 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB

MSB 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB

32 clocks

Fig.20 I2S Data Format 64fs, 24 bit Data

32 clocks

LRCLK

BCLK

SDATA1

(SDATA2)

Lch

Rch

MSB 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB

MSB 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB

Fig.21 I2S Data Format 64fs, 20 bit Data

LRCLK

BCLK

SDATA1

(SDATA2)

Lch

MSB 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB

Rch

MSB 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB

Fig.22 I2S Data Format 64fs, 16 bit Data

The Low section of LRCLK becomes Lch, the High section of LRCLK becomes Rch.

After changing LRCLK, second bit becomes MSB.

●Left-justified format

LRCLK

1/64fs

Lch

Rch

BCLK

SDATA1

(SDATA2)

MSB 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB

MSB 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB

32 clocks

32 clocks

Fig.23 Left-Justified Data Format 64fs, 24 bit Data

LRCLK

BCLK

SDATA1

(SDATA2)

Lch

Rch

MSB 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB

MSB 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB

Fig.24 Left-Justified Data Format 64fs, 20 bit Data

LRCLK

Lch

Rch

BCLK

SDATA1

(SDATA2)

MSB 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB

MSB 14 13 12 11 10 9 8 7 6 5 4 3 2 1 LSB

Fig.25 Left-Justified Data Format 64fs, 16 bit Data

The High section of LRCLK becomes Lch, the Low section of LRCLK becomes Rch.

After changing LRCLK, first bit becomes MSB.

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13/31

2011.06 - Rev.C

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