AD1845 Analog Devices, AD1845 Datasheet - Page 17

• Manufacturer Part Number: AD1845
• Description: Parallel-port 16-Bit Soundport Stereo Codec
• Manufacturer: Analog Devices

REV. B
This register’s initial state after reset is “000x 0000.”
LX1A4:0
res
LMX1
This register’s initial state after reset is “1xx0 1000.”
RX1A4:0
res
RMX1
This register’s initial state after reset is “1xx0 1000.”
LX2A4:0
res
LMX2
This register’s initial state after reset is “1xx0 1000.”
Left Auxiliary #1 Input Control (IXA3:0 = 2)
Right Auxiliary #1 Input Control (IXA3:0 = 3)
Right Auxiliary #2 Input Control (IXA3:0 = 5)
Left Auxiliary #2 Input Control (IXA3:0 = 4)
IXA3:0
IXA3:0
IXA3:0
IXA3:0
2
3
5
4
RSS1
0
0
1
1
Left Auxiliary Input #1 Attenuate Select. The least significant bit of this gain/attenuate select represents 1.5 dB.
LX1A4:0 = 0 produces a +12 dB gain. LX1A4:0 = “01000” (8 decimal) produces 0 dB gain. Maximum attenua-
tion is –34.5 dB. See Figure 10.
Reserved for future expansion. Always write zeros to these bits.
Left Auxiliary #1 Mute. This bit, when set, will mute the left channel of the Auxiliary #1 input source. This bit
powers up set.
Right Auxiliary Input #1 Attenuate Select. The least significant bit of this gain/attenuate select represents
1.5 dB. RX1A4:0 = 0 produces a +12 dB gain. RX1A4:0 = “01000” (8 decimal) produces 0 dB gain. Maximum
attenuation is –34.5 dB. See Figure 10.
Reserved for future expansion. Always write zeros to these bits.
Right Auxiliary #1 Mute. This bit, when set, will mute the right channel of the Auxiliary #1 input source. This
bit powers up set.
Left Auxiliary Input #2 Attenuate Select. The least significant bit of this gain/attenuate select represents 1.5 dB.
LX2A4:0 = 0 produces a +12 dB gain. LX2A4:0 = “01000” (8 decimal) produces 0 dB gain. Maximum attenua-
tion is –34.5 dB. See Figure 10.
Reserved for future expansion. Always write zeros to these bits.
Left Auxiliary #2 Mute. This bit, when set to 1, will mute the left channel of the Auxiliary #2 input source. This
bit powers up set.
Data 7
Data 7
Data 7
LMX1
RMX1
Data 7
RMX2
LMX2
RSS0
0
1
0
1
Right Input Source
Right Line Source Selected
Right Auxiliary 1 Source Selected
Right Microphone Source Selected
Right Post-Mixed DAC Output Source Selected
Data 6
Data 6
Data 6
Data 6
res
res
res
res
Data 5
Data 5
Data 5
Data 5
res
res
res
res
–17–
Data 4
LX1A4
Data 4
RX1A4
LX2A4
RX2A4
Data 4
Data 4
Data 3
LX1A3
Data 3
RX1A3
Data 3
LX2A3
Data 3
RX2A3
Data 2
LX1A2
Data 2
RX1A2
Data 2
LX2A2
Data 2
RX2A2
Data 1
LX1A1
Data 1
RX1A1
Data 1
LX2A1
Data 1
RX2A1
LX1A0
RX1A0
LX2A0
Data 0
Data 0
Data 0
RX2A0
AD1845
Data 0