CS4385-CQZ(2004) Ver la hoja de datos (PDF) - Cirrus Logic
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CS4385-CQZ Datasheet PDF : 56 Pages
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CS4385
Pin Name #
Pin Description
VQ
21 Quiescent Voltage (Output) - Filter connection for internal quiescent voltage. VQ must be capacitively
coupled to analog ground, as shown in the Typical Connection Diagram. The nominal voltage level is
specified in the Analog Characteristics and Specifications section. VQ presents an appreciable source
impedance and any current drawn from this pin will alter device performance. However, VQ can be
used to bias the analog circuitry assuming there is no AC signal component and the DC current is less
than the maximum specified in the Analog Characteristics and Specifications section.
MUTEC1
MUTEC234
41 Mute Control (Output) - The Mute Control pins go high during power-up initialization, reset, muting,
22 power-down or if the master clock to left/right clock frequency ratio is incorrect. These pins are intended
to be used as a control for external mute circuits to prevent the clicks and pops that can occur in any sin-
gle supply system. The use of external mute circuits are not mandatory but may be desired for designs
requiring the absolute minimum in extraneous clicks and pops.
AOUTA1 +,-
AOUTB1 +,-
AOUTA2 +,-
AOUTB2 +,-
AOUTA3 +,-
AOUTB3 +,-
AOUTA4 +,-
AOUTB4 +,-
39, 40 Differential Analog Output (Output) - The full scale differential analog output level is specified in the
38, 37 Analog Characteristics specification table.
35, 36
34, 33
29, 30
28, 27
25, 26
24, 23
VA
32 Analog Power (Input) - Positive power supply for the analog section. Refer to the Recommended Oper-
ating Conditions for appropriate voltages.
VLS
43 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.
Software Mode Definitions
SCL/CCLK
SDA/CDIN
AD0/CS
15 Serial Control Port Clock (Input) - Serial clock for the serial control port. Requires an external pull-up
resistor to the logic interface voltage in I2C mode as shown in the Typical Connection Diagram.
16 Serial Control Data (Input/Output) - SDA is a data I/O line in I2C mode and requires an external pull-up
resistor to the logic interface voltage, as shown in the Typical Connection Diagram. CDIN is the input
data line for the control port interface in SPI mode.
17 Address Bit 0 (I2C) / Chip Select (SPI) (Input) - AD0 is a chip address pin in I2C mode; CS is the chip
select signal for SPI format.
TST
10 Test (Input) - These pins are not used in software mode and should not be left floating (connect to
12 ground).
Hardware Mode Definitions
M0
17 Mode Selection (Input) - Determines the operational mode of the device as detailed in Tables 4 and 5.
M1
16
M2
15
M3
12
M4
10
DSD Definitions
DSD_SCLK 42 DSD Serial Clock (Input) - Serial clock for the Direct Stream Digital audio interface.
DSDA1
DSDB1
DSDA2
DSDB2
DSDA3
DSDB3
DSDA4
DSDB4
3 Direct Stream Digital Input (Input) - Input for Direct Stream Digital serial audio data.
2
1
48
47
46
45
44
DS671A1
5
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