CS4244-CNZ Cirrus Logic Inc, CS4244-CNZ Datasheet - Page 24

• Manufacturer Part Number: CS4244-CNZ
• Description: IC 4 Input / 5 Output CODEC
• Manufacturer: Cirrus Logic Inc

DS900PP2
4.3
I²C Control Port
All device configuration is achieved via the I²C control port registers as described in the
cations - Control Port
to the audio sample rates. However, to avoid potential interference problems, the I²C pins should remain
static if no operation is required. The
SDA is a bidirectional data line. Data is clocked into and out of the device by the clock, SCL. The AD0 and
AD1 pins form the two least significant bits of the chip address and should be connected through a resistor
to VL or GND as desired. The SDOUT2 pin is used to set the AD2 bit by connecting a resistor from the
SDOUT2 pin to VL or to GND. The state of these pins are sensed after the
and 16, the VQ voltage will never rise to its minimum operating voltage. If the VQ voltage never rises
above this minimum operating voltage, the device will not finish the power-up sequence and normal op-
eration will not begin.
Also note that any AOUTx± pin(s) with a DC load must remain powered up (PDN DACx = 0) to keep the
VQ net at its nominal voltage during normal operation, otherwise clipping may occur on the outputs.
Note that the load capacitors (CL
on the VQ net during power-up will affect the amount of time it takes for the VQ voltage to rise to its nom-
inal operating voltage after VA power is applied. The time period can be calculated using the time constant
given by the internal series resistor and the load capacitors.
table. The operation via the control port may be completely asynchronous with respect
NET
VA
VQ
~140kΩ
~140kΩ
Figure 10. DAC DC Loading
x
) are also in parallel during power-up. The amount of total capacitance
CS4244
External VQ
capacitor
acts as an I²C slave device.
S1±
S2±
S3±
S4±
AOUT1+
AOUT2+
AOUT3+
AOUT4+
AOUT1-
AOUT2-
AOUT3-
AOUT4-
RL
RL
RL
RL
RL
RL
RL
RL
1+
2+
3+
4+
1-
2-
3-
4-
CL
CL
CL
CL
CL
CL
CL
CL
1+
2+
3+
4+
1-
2-
3-
4-
CS4244
is released from reset.
Switching Specifi-
CS4244
24