CDB4245【PDF 8/59 页】BOARD EVAL FOR CS4245 CODEC

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Sheet目录1201

4页 5页 6页 7页 [8页]9页 10页 11页 12页

CS4245

AGND

VA

AFILTA

AFILTB

VQ1

VQ2

FILT1+

FILT2+

AIN4A/MICIN1

AIN4B/MICIN2

AIN5A

AIN5B

MICBIAS

AIN6A

AIN6B

AUXOUTA

AUXOUTB

VA

13

14

15

16

17

18

19

20

21, 22

23, 24

25

26, 27

28, 29

30

Analog Ground ( Input ) - Ground reference for the internal analog section.

Analog Power (Input) - Positive power for the internal analog section.

Antialias Filter Connection ( Output ) - Antialias filter connection for the channel A ADC input.

Antialias Filter Connection ( Output ) - Antialias filter connection for the channel B ADC input.

Quiescent Voltage 1 ( Output ) - Filter connection for the internal quiescent reference voltage.

Quiescent Voltage 2 ( Output ) - Filter connection for the internal quiescent reference voltage.

Positive Voltage Reference 1 ( Output ) - Positive reference voltage for the internal sampling circuits.

Positive Voltage Reference 2 ( Output ) - Positive reference voltage for the internal sampling circuits.

Stereo Analog Input 4 / Microphone Input 1 & 2 ( Input ) - The full-scale level is specified in the ADC

Analog Characteristics specification table.

Stereo Analog Input 5 ( Input ) - The full-scale level is specified in the ADC Analog Characteristics

specification table.

Microphone Bias Supply ( Output ) - Low-noise bias supply for external microphone. Electrical charac-

teristics are specified in the DC Electrical Characteristics specification table.

Stereo Analog Input 6 ( Input ) - The full-scale level is specified in the ADC Analog Characteristics

specification table.

Auxiliary Analog Audio Output ( Output ) - Analog output from either the DAC, the PGA block, or high

impedance. See “Auxiliary Output Source Select (Bits 6:5)” on page 46 .

Analog Power (Input) - Positive power for the internal analog section.

AGND

31, 32 Analog Ground ( Input ) - Ground reference for the internal analog section.

AOUTA

AOUTB

MUTEC

VLS

SDIN

SCLK2

LRCK2

MCLK2

SDOUT

SCLK1

LRCK1

MCLK1

DGND

VD

INT

OVFL

8

33, 34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

DAC Analog Audio Output ( Output ) - The full-scale output level is specified in the DAC Analog Char-

acteristics specification table.

Mute Control (Output) - This pin is active during power-up initialization, reset, muting, when master

clock to left/right clock frequency ratio is incorrect, or power-down.

Serial Audio Interface Power ( Input ) - Determines the required signal level for the serial audio inter-

face. Refer to the Recommended Operating Conditions for appropriate voltages.

Serial Audio Data Input ( Input ) - Input for two’s complement serial audio data.

Serial Port 2 Serial Bit Clock (Input/Output ) - Serial bit clock for serial audio interface 2.

Serial Port 2 Left Right Clock (Input/Output ) - Determines which channel, Left or Right, is currently

active on the serial audio input data line.

Master Clock 2 ( Input ) - Optional asynchronous clock source for the DAC’s delta-sigma modulators.

Serial Audio Data Output ( Output ) - Output for two’s complement serial audio data.

Serial Port 1 Serial Bit Clock (Input/Output ) - Serial bit clock for serial audio interface 1.

Serial Port 1 Left Right Clock (Input/Output ) - Determines which channel, Left or Right, is currently

active on the serial audio output data line.

Master Clock 1 ( Input ) - Clock source for the ADC’s delta-sigma modulators. By default, this signal

also clocks the DAC’s delta-sigma modulators.

Digital Ground ( Input ) - Ground reference for the internal digital section.

Digital Power ( Input ) - Positive power for the internal digital section.

Interrupt ( Output ) - Indicates an interrupt condition has occurred.

ADC Overflow ( Output ) - Indicates an ADC overflow condition is present.

DS656F3

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