Rainbow-electronics AT73C246 Manual do Utilizador descarregar pdf (Página 68)

11050A–PMAAC–07-Apr-10

AT73C246

12.6.5 Timing Specifications

Figure 12-10. Timing Diagram of data interface (I²S Mode)

12.7 Digital Filters Transfer Function

12.7.1 DAC Frequency Response

The following diagrams are referred to FS = 1 (Sampling Frequency).

Figure 12-11. DAC Type 0 Frequency Response

MSB

LRFS

BCLK

DAI

DAO

VXL

VXH

VIL

VIH

VIL

VIH

Word N-1

Right Channel

Word N

Left Channel

Word N

Right Channel

LRCLK

TBCLK

THSDX

TLSDX

TLRCLK

Table 12-4. Digital Audio InterfaceTiming Specifications

Parameter Symbols Min Typ Max Unit

Left/Right Word Cycle Time T

LRCLK

1 / (2 x F

Bit Clock Period T

BCLK

MCLK

/ 2 s

BCLK Posedge to {DAI, DAO and LRFS} Change

Hold Time

HSDX

5ns

{DAI, DAO and LRFS} Change to BCLK

Posedge Setup Time

LSDX

5ns

Overall Ripple

1 2 ... 63 64 65 66 67 68 69 70 71 72 73 ... 158 159

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