ad1816a Analog Devices, Inc., ad1816a Datasheet - Page 35

• Manufacturer Part Number: ad1816a
• Description: Soundport Controller
• Manufacturer: Analog Devices, Inc.

REV. A
[20] ADC SOURCE SELECT AND ADC PGA
LAGC
MCM
PIA [3:0]
PIM
MCA [4:0]
M20
MCM
RAG [3:0]
RAGC
LAG [3:0]
LAGC
RAS [2:0]
000
001
010
011
100
101
110
111
Note: When the AGC is enabled, gain control settings for the ADC PGA are overridden for all inputs.
I
I
COF [3:0]
CNP
CDE
WSE
[19] MIC/PHONE
WSE
[32] CHIP CONFIGURATION
2
2
SF0 [1:0]
SF1 [1:0]
7
7
7
CDE
M20
6
6
6
LAS [2:0]
RES
PHONE_IN Mute.
Microphone Attenuation. The LSB represents –1.5 dB, 00000 = +12 dB and the range is 12 dB to –34.5 dB.
Microphone 20 dB Gain. The M20-bit enables the Microphone +20 dB gain stage.
Microphone Mute.
Right Automatic Gain Control (AGC) Enable, 1 = Enabled, 0 = Disabled.
Left Automatic Gain Control (AGC) Enable, 1 = Enabled, 0 = Disabled.
ADC Right Input Source
Capture not equal to Playback.
CD Enable, Set to “1” when a CD player is connected to I
Sound System Enable.
PHONE_IN Attenuation. The LSB represents –3 dB, 0000 = 0 dB and the range is 0 dB to –45 dB.
Right ADC Gain Control ADC source select and Gain. For Gain, LSB represents +1.5 dB, 0000 = 0 dB
and the range is 0 dB to +22.5 dB.
Left ADC Gain Control ADC source select and Gain. For Gain, LSB represents +1.5 dB, 0000 = 0 dB
and the range is 0 dB to +22.5 dB.
R_LINE
R_OUT
R_CD
R_SYNTH
R_VID
Mono Mix
Reserved
Reserved
I
Clock Output Frequency. Programmable clock output on PCLKO pin is determined using the following formula
PCLKO = 256
SS [38]. If COF > 11, then PCLKO is disabled.
0 = Capture equals Playback. The capture sample rate is determined by the playback sample rate in SS [02].
1 = Capture not equal to Playback.
the analog CD attenuator inputs to I
0 = SoundBlaster Mode.
1 = Sound System Mode under Windows.
Note: When in SoundBlaster Mode, the Codec ADC and DAC channels will be used solely for converting
SoundBlaster data.
2
RES
S Port Configuration for serial data type.
5
5
5
_
IN GAIN/ATTENUATION
CNP
4
4
4
00
01 Right Justified
10
11 Left Justified
PCR/2
3
3
3
Disabled
I
2
S Justified
MCA [4:0]
COF
LAG [3:0]
2
2
2
where COF = 0:11 and PCR is the value of the Programmable Clock Rate Register,
RES
1
1
1
2
S (0) serial port.
0
0
0
–35–
RAGC
PIM
7
7
7
LAS [2:0]
000
001
010
011
100
101
110
111
COF [3:0]
2
6
6
6
S (0), maps SoundBlaster CD mixer controls from
RES
RAS [2:0]
5
5
5
ADC Left Input Source
L_LINE
L_OUT
L_CD
L_SYNTH
L_VID
MIC
PHONE_IN
Reserved
4
4
4
I
3
2
PIA [3:0]
3
3
SF1 [1:0]
DEFAULT = [0x8888]
DEFAULT = [0x0000]
DEFAULT = [0x00F0]
RAG [3:0]
2
2
2
AD1816A
I
1
2
1
1
SF0 [1:0]
RES
0
0
0