AD1849K Analog Devices, AD1849K Datasheet - Page 15

• Manufacturer Part Number: AD1849K
• Description: Serial-Port 16-Bit SoundPort Stereo Codec
• Manufacturer: Analog Devices

REV. 0
Data Byte 6, Output Setting Register 2
ADI
SM
RO5:0
Data Byte 7, Input Setting Register 1
PIO1:0
OVR
IS
LG3:0
Data Byte 8, Input Setting Register 2
MA3:0
RG3:0
Data 7
Data 7
Data 7
PIO1
MA3
ADI
ADC Invalid. This bit is set to “1” during the autocalibration sequence, indicating that the serial data output from the
ADCs is meaningless.
Mono Speaker Analog Mute:
Output attenuation setting for the right DAC channel; “0” represents no attenuation. Step size is 1.5 dB; “62”
represents 93 dB of attenuation. Attenuation = 1.5 dB RO, except for RO = “63,” which represents full digital mute.
Parallel I/O bits for system signaling. PIO bits do not affect Codec operation.
ADC input overrange. This bit is set to “1” if either ADC channel is driven beyond the specified input range. It is
“sticky,” i.e., it remains set until explicitly cleared by writing a “0” to OVR. A “1” written to OVR is ignored,
allowing OVR to remain “0” until an overrange condition occurs.
Input selection:
Input gain for left channel. “0” represents no gain. Step size is 1.5 dB; “15” represents +22.5 dB of input gain.
Gain = 1.5 dB LG.
Monitor mix. “0” represents no attenuation, i.e., the ADCs’ output is fully mixed with the DACs’ input. Step size
is 6 dB; “14” represents an attenuation of both channels of the ADCs’ output along the monitor datapath of
84 dB. Mix attenuation = 6 dB
Input gain for right channel. “0” represents no gain. Step size is 1.5 dB; “15” represents +22.5 dB of input gain.
Gain = 1.5 dB
23
15
7
0
1
0
1
Mute mono speaker
Mono speaker on
Line-level stereo inputs
Microphone (condenser-type) level inputs if MB = 0 (+20 dB gain), or line-level stereo inputs if MB = 1
(0 dB gain).
Data 6
Data 6
Data 6
PIO0
MA2
SM
22
14
6
RG.
Data 5
Data 5
Data 5
MA1
RO5
OVR
21
13
5
MA, except for MA = “15,” which disables monitor mix entirely.
Data 4
Data 4
Data 4
MA0
RO4
20
IS
12
4
–15–
Data 3
Data 3
Data 3
RO3
LG3
RG3
19
11
3
Data 2
Data 2
Data 2
RO2
LG2
RG2
18
10
2
Data 1
Data 1
Data 1
RO1
LG1
RG1
17
9
1
AD1849K
Data 0
Data 0
Data 0
RO0
LG0
RG0
16
8
0