CS4811 View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
CS4811 Datasheet PDF : 24 Pages
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CS4811
Voltage Reference
CMOUT - Common Mode Output
Output: This pin provides an internally generated reference of 2.3 V to be used for biasing external
analog circuitry. The load on CMOUT must be DC only, with an impedance of not less than 50 kilohms.
CMFILT+,CMFILT- - Common Mode Filter Connections
Inputs: These pins are connections for external filter components required by the internal common mode
reference circuit. See the typical connection diagram in Figure 3. for details.
Serial Control Port
SPI/I2C - Serial Control Port Format Select
Input: This pin configures the control port for I2C format if tied to VD or SPI format if tied to DGND.
SCL/CCLK - Serial Control Port Clock
Output: This pin clocks serial control port data into and out of SDA in I2C mode. In SPI mode, it clocks
control port data into CDIN and out of CDOUT.
AD0/CS - I2C Address Bit 0 / SPI Chip Select
Input/Output: In I2C® mode, AD0 is an input and must be tied to ground. In SPI mode, CS is an output
and is used to select the boot EEPROM.
AD1/CDIN - I2C Address Bit 1 / SPI Data Input
Input: In I2C® mode, AD1 is an input and must be tied to ground. In SPI mode, CDIN is the serial
control port data input and is clocked in on the rising edge of CCLK.
SDA/CDOUT - I2C Data / SPI Data Output
Bidirectional/Output: In I2C® mode, SDA is the bidirectional data I/O line. In SPI mode, CDOUT is the
serial control port data output and is clocked out on the falling edge of CCLK.
Clock and Crystal
XTI, XTO - Crystal Oscillator Connections (Master Clock)
Input, Output: These pins provide connections for an external parallel resonant quartz crystal.
Alternately, an external clock source may be applied to XTI. The clock frequency must be 256xFs.
DS486PP2
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