SPCA751A-P101 View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

SPCA751A-P101

single chip signal processor optimized for MPEG audio decoding and voice recording

Unspecified 

Preliminary

SPCA751A-P101

! PCM Interface

The PCM Interface is used to output decoded audio data to external audio DAC. There are 4 signals, AUD_XCK,

AUD_LRCK, AUD_BCK and AUD_DATA. The signal format of PCM Interface is programmable with register 0x3fDE.

Register Name Register # Bits Description

(Value set at initialization) (0x2103)

AUD_CONFIG 0x3FDE

14 Audio out configuration (RW)

bit 0 = I2S control

(0 = I2S, 1 = normal)

bit 1 = AUD_XCK select

(0 = 256×Fs, 1 = 384×FS)

bit 2 = AUD_DATA LSB / MSB sent first (0 = MSB first, 1 = LSB first)

bit 3 = AUD_BCK active edge

(0 = falling, 1 = rising)

bit 4 = AUD_XCK IO select

(0 = output, 1 = input)

bit 5 = LRCK polarity

(0 = LRCK low is right, 1 = LRCK low

is left)

bit 12 = CD-DA pass through mode

(0 = disable, 1 = enable)

Normal Mode:

AUD_BCK

AUD_LRCK

AUD_DATA

0 15 14

1 0 15 14

BCK = 32 x Fs

1 0 15 14

AUD_BCK

AUD_LRCK

AUD_DATA

0

15

14

10

15

14

BCK = 48 x Fs

1 0 15

I2S Mode:

AUD_BCK

AUD_LRCK

AUD_DATA

1 0 15 14

AUD_BCK

AUD_LRCK

AUD_DATA

0 1514

1 0 15 14

BCK = 32 x Fs

0

1514

BCK = 48 x Fs

PCM Interface waveform

1 0 15

0

1514

6

Share Link: