CS4244-CNZ Cirrus Logic Inc, CS4244-CNZ Datasheet - Page 42

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

DS900PP2
4.7
Reset Line
The reset line of the CS4244 is used to place the device into a reset condition. In this condition, all of the
values of the CS4244 control port are set to their default values. This mode of operation is the lowest power
mode of operation for the CS4244 and should be used whenever the device is not operating in order to save
power. During the power up and power down sequence, it is often necessary for the CS4244 devices to be
placed into (and taken out of) reset at a different moment in time than the amplifiers to which they are con-
nected in order to minimize audible clicks and pops during the sequence. For this reason, it is advisable to
run separate reset lines for each type of device, i.e. one reset line for the CS4244 devices and one for the
amplifier devices.
When the upper “x” bits, as dictated by the DAC1-4 NG[2:0] settings, are either all “1’s” or all “0’s” for 8192
consecutive samples, the Noise Gate will engage for that channel. Setting these bits to ‘111’ will disable
the Noise Gate feature. If the Noise Gate feature engages, it will transition into and out of mute as dictated
by the
DAC1-4 ATT.
DAC1-4 NG[2:0] Setting
bit in the
000
001
010
011
100
101
110
111
"DAC Control 3"
Table 7. Noise Gate Bit Depth Settings
register.
Channel is muted after “x” bits
Upper 18 Bits (-102 dB)
Upper 24 Bits (-138 dB)
Upper 13 Bits (-72 dB)
Upper 14 Bits (-78 dB)
Upper 15 Bits (-82 dB)
Upper 17 Bits (-94 dB)
Upper 16 Bits (-90 dB)
Noise Gate Disabled
CS4244
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