Datasheet

PCM3010
SLES055 – NOVEMBER 2002
24
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PCM audio interface
Digital audio data is interfaced to the PCM3010 on LRCK (pin 10), BCK (pin 11), DIN (pin 12), and DOUT
(pin 13). The PCM3010 can accept the following 16-bit and 24-bit formats. These formats are selected through
FMT0 (pin 7) and FMT1 (pin 8), as shown in Table 2.
Table 2. Audio Data Format Select
FMT1 FMT0 DAC DATA FORMAT ADC DATA FORMAT
LOW LOW 24-bit, MSB-first, right-justified 24-bit, MSB-first, left-justified
LOW HIGH 16-bit, MSB-first, right-justified 24-bit, MSB-first, left-justified
HIGH LOW 24-bit, MSB-first, left-justified 24-bit, MSB-first, left-justified
HIGH HIGH 24-bit, MSB-first, I
2
S 24-bit, MSB-first, I
2
S
The PCM3010 accepts two combinations of BCK and LRCK, 64 or 48 clocks of BCK in one clock of LRCK. The
following figures illustrate audio data input/output format and timing.
FORMAT 0: FMT[1:0] = 00
DAC: 24-Bit, MSB-First, Right-Justified
LRCK
Right ChannelLeft Channel
BCK
DIN
24
22 23 24321
MSB
LSB
22 23 24321
MSB
LSB
ADC: 24-Bit, MSB-First, Left-Justified
BCK
LRCK
Right ChannelLeft Channel
DOUT
122 23 24321
MSB
LSB
22 23 24321
MSB
LSB
FORMAT 1: FMT[1:0] = 01
LRCK
Right ChannelLeft Channel
BCK
DIN
16 14 15 16321
MSB
LSB
14 15 16321
MSB
LSB
DAC: 16-Bit, MSB-First, Right-Justified
ADC: 24-Bit, MSB-First, Left-Justified
BCK
LRCK
Right ChannelLeft Channel
DOUT
122 23 24321
MSB
LSB
22 23 24321
MSB
LSB
Figure 47. Audio Data Input/Output Format