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NXP Semiconductors

Product specification

Economy audio CODEC for MiniDisc (MD) home stereo and portable applications

UDA1341TS

7.21.3

DATA0 EXTENDED PROGRAMMING REGISTERS

Table 25 Extended control registers

0

0

0

MA4

MA3

MA2

MA1

0

0

1

MB4

MB3

MB2

MB1

0

1

0

MS2

MS1

MS0 MM1

EA2 EA1 EA0 ED4 ED3 ED2

ED1

1

0

1

IG6

IG5

IG4

IG3

1

1

0

AT2

AT1

AT0

AL1

1

0

  • 0

    AG

0

  • 0

    IG1

ED0

REGISTER SELECTED

MA0 MA = mixer gain channel 1 (5 bits) MB0 MB = mixer gain channel 2 (5 bits) MM0 MS = MIC sensitivity (3 bits) MM = mixer mode (2 bits) AG = AGC control IG = input amplifier gain channel 2 (2 bits) IG = input amplifier gain channel 2 (5 bits) AT = AGC time constant (3 bits) AL = AGC output level (2 bits) IG0 IG2 AL0

Programming via extended addressing is done by first sending a DATA0 data byte EA (3 bits) which specifies the addresses of the extended register followed by a DATA0 data byte which specifies the contents of the extended data register (5 bits). The EA extended addresses and names of the extended data registers are given in Table 25.

7.21.3.1

Mixer gain control

Two 5-bit values to program the channel 1 (MA) and channel 2 (MB) coefficients in the mixer mode. The range is from 0 to −∞ dB in steps of 1.5 dB. The default settings are given in Table 5.

Table 26 Mixer gain control channel 1 and channel 2 settings

0

0

0

0

0

0

0

0

0

0

1

1.5

0

0

0

1

0

3.0

:

:

:

:

:

:

1

1

1

0

1

43.5

1

1

1

1

0

45.0

1

1

1

1

1

−∞

MA4 MA3 MA2

MA1

MA0

MB4 MB3 MB2

MB1

MB0

MIXER GAIN (dB)

0

0

0

3

0

0

1

0

0

1

0

+3

0

1

1

+9

1

0

0

+15

1

0

1

+21

1

1

0

+27

1

1

1

Table 27 MIC sensitivity settings

MIC AMPLIFIER GAIN MS2 MS1 MS0 (dB)

not used

A 3-bit value to program eight gain settings of the microphone amplifier. These settings are valid only when AGC control is enabled and not in the double differential mode. The default setting is given in Table 5.

7.21.3.2

MIC sensitivity

2002 May 16

19

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